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3 things that make a PCM Cooling Headband your go-to summer accessory.

4 Things to Decide Before Ordering Your UnderCool Cooling Vest

How Kathy Regan Manages Heat Sensitivity with MS


Amarillo, Texas. My hometown

How to wear a Cooling Vest at an Amusement Park

Newsletter - April 2019

Are ThermApparel UnderCool Cooling Vests machine washable?

August 2018 Newsletter


Ballroom Dancing for People with Multiple Sclerosis

Benefits of cooling during exercise.

Study: Benefits of Low Temperature Exercise for MS Patients

Best Fabrics for Summer

Best Workouts for MS

Big Fun at Al Sigl's WalkAbout

Big Purchase? No Problem with Affirm.

Can ThermApparel Phase Change Material (PCM) Cooling Packs be left in the Freezer?

Can You RIP UP MS? - #ripupms

Is There a Connection Between Fibromyalgia and MS?

Cool Stories - Tom

Cooling Gear GIVEAWAY for MS Awareness Month 2019!

Cooling off at the 2019 annual meeting of the Consortium of Multiple Sclerosis Centers

Cooling Solutions. Thermapparel Testimonials. Now I Can. Cool Stories From Cool Customers Nancy

Cooling Solutions

Breast Cancer, Hot Flashes and Cooling

Staying Cool at Walt Disney World

ThermApparel Testimonials - Now I Can - Cool Stories from Cool Customers - Amanda

UnderCool Cooling Vest Now Available in Australia at RehaCare

Cooling Vests for costumes

Cooling Vests for Santa or How does Santa keep his cool?

Cooling Vests reduce the effects of heat stress and heat related illness.

COVID-19 Vaccine Guidance for People Living with MS

Customer Account Login - New for 2022

Best Cooling Gear for a Ride


Daily Cup of Flavonoid-rich Cocoa May Help Ease MS Fatigue

David Lyons MS Fitness Challenge testimonial - Why you need to wear a cooling vest when you work out

David Lyons MS Fitness Challenge Testimonial

Dawnmaire Deshaies Testimonial

Dawnmarie Healthy and Fit Interviews Brad and Kurtis, co-founders of ThermApparel

Newsletter - December 2018

Diet Tips for Managing MS Symptoms

Don't forget about Mom this Mother's Day

don't sweat the suit

Earth Day and Cooling Pack Recycling Program through ThermApparel

Easy (Really!) Halloween Costumes

Electric Mountain Cart takes disabled riders off-road



Newsletter - February 2019

FitKit how to find and measure your natural waist for a ThermApparel UnderCool Cooling Vest

FUMS Podcast with Dr. Gretchen Hawley from MSing Link

Blogs we love: Multiple Sclerosis News Today: Funding Supports MS Research on Epigenetics and Fatigue in Australia

MS Fitness Challenge Podcast with Maureen Manley

Give a cool gift with a ThermApparel Gift Card

Giving Thanks

Go-Kart Cooling Plan

Podcast: Stay Cool and Look It Too

STUDY: New UK guidelines for pregnancy in multiple sclerosis

Handicap Parking Guide According to Dave

Harvey Relief

Health and Wellness Expo


10 things you should know when your spouse has MS.

16 Alternative uses for your UnderCool Cooling Vest

3 types of stress, their signs and simple things you can do to reduce your stress levels

4 Reasons Why It's Time to Replace Your Sneakers

6 Gym Bag Essentials to Keep You Cool During Your Workout

8 Key Questions About Multiple Sclerosis

8 Products Women with Rheumatoid Arthritis Swear By to Cope with Their Symptoms

9 Impressive Health Benefits of Pumpkin

A Day at the Grill

STUDY: Acute High-Intensity Interval Exercise in Multiple Sclerosis with Mobility Disability.

Dr. Gretchen of the MSing Link's review of ThermApparel UnderCool Cooling Vests

Heat intolerance with Dr. Gretchen Hawley at The MSing Link

Tips to reduce your risk of infection with COVID-19, coronavirus, or other viral outbreaks.


#HeatIQ Crafting a Personalized Cooling Plan Blog Series Home

STUDY: High-intensity interval exercise improves cognitive performance in MS

STUDY: High intensity interval training for people with multiple sclerosis: A systematic review.


Hot Flashes Suck. Does your Mom suffer from Hot Flashes? If Yes, we have the PERFECT gift for Mothers Day.

Hottest Cooling Workout Gear

How Can I Get A Prescription For A Cooling Vest?

How can you help someone with multiple sclerosis?

How Do You Wear A Cooling Vest Like UnderCool?

How Does A Cooling Vest Work?

How hot is your mom?

How Long do ThermApparel Cooling Packs Last

How Long Does it Take to Recharge PCM Phase Change Material Cooling Packs?

Q: How much does a ThermApparel Cooling Vest weigh?

Blogs we love: Multiple Sclerosis.Net: How Temperature Changes Can Affect My MS Body

How Temperature Effects Productivity

How To Do 10,000 Things at Once

How to exchange or return with ThermApparel

Sizing your ThermApparel UnderCool Cooling Vest

How to insert ThermApparel Cooling Packs in to the Vest Garment

How to Make a SMART Resolution and why you should

How to Manage Hot Flashes

How to Prep for a Cookout

How to Prep for the TSA

How to Prep Your Home for Summer II

How to Prep Your Home for Summer

How to Prepare for a Ride

How to Prepare for a Walk

How to Properly Store Your ThermApparel UnderCool Cooling Packs over the Winter

How to recharge ThermApparel Cooling Packs

How to refreezing cooling packs in ice water

How to start a MS exercise program

How to Stay Cool at Night

How to Stay Cool

How to stay safe during a heat wave

How To

Do I need a cooling vest for my costume?

Do you know what to do if a service dog approaches you without a person?

Hugging: a beautiful form of communication

Hydration Guide

STUDY: Sailing Sclerosis Oceans of Hope Journey.

STUDY: Effectiveness of walking exercise program in improving fatigue in relapsing remitting multiple sclerosis patients

In Case of Emergency

In the Defense of Resolutions

In the Defense of Sunlight

Innovative cooling vest improves performance racers overall performance

Inside Look: Accessibility in the NY State Fair

Inside Look: Day on the Track

STUDY: The effect of regular interval training on histochemical symptoms and cytokine and neurotrophic levels

Interesting facts about sweating, breathing, and the science of cooling our bodies

Part 1: Introduction to Crafting a Personalized Cooling Plan, Improve your #HeatIQ

Is UnderCool a Cooling Vest?

James the Mountain Man survives 104 degree heat in Georgia

Newsletter - January 2019

Newsletter - July 2018

Newsletter - June 2018


Let's Go Swimming

LupsChick and ThermApparel

Lupus and Heat Sensitivity

Newsletter - March 2019

Newsletter - May 2018

Newsletter - May 2019

Midwest FurFest 2023

MS Awareness Month

Financial Assistance for People With MS

Addressing Unmet Needs in MS: An Innovation Challenge

MS Patients Using Cooling Vests Show Significant Exercise Gains

MS Research Translated: How Physical Ability Affects Social Participation

MS Research Translated: How to Reduce Fatigue During Exercise

MS Research Translated: Impact of pre-cooling therapy on MS patients.

What do Multiple Sclerosis, Mayor Bill de Blasio, Mother Cabrini and ThermApparel have in common?

National Heat Awareness Day


12-part Video Series, ‘Understanding Multiple Sclerosis,’ Available Online

A Chronic Voice Top 10 Articles from 2018

Happy New Year 2021

Meet The Team - Julia - Local Business Spotlight - Rochester Women Online

Overheating and Protective Facemasks

Stay Informed During the Coronavirus Pandemic

ThermApparel featured on Good Day New York - COVID-19 Summer toolkit

Things To Do During the Coronavirus Pandemic


Newsletter - November 2018

NWSA World Series 2018 Kansas City, KS

Newsletter - October 2018

Newsletter October 2019

Part 2: Why a Cooling Plan is important

Part 5: Factors I can control that affect heat related illness

Part 4: Environmental Risk Factors for Heat Stress

Part 7: Making Your Cooling Plan

Part 6: Creating a Cooling Toolbox

Part 3: Personal Risk Factors for Heat Stress

STUDY: Pilates for people with multiple sclerosis: A systematic review and meta-analysis

Podcast - The MSing Link with Dr. Gretchen Hawley

Powerful Solutions at RIT's IdeaLab


Brain cell transplants repair MS damage in mice

Study Suggests Role for Sunlight Exposure in Reducing the Severity of MS

Researchers examine extreme heat, multiple sclerosis link and high frequency of MS clinic visits



#RIPUPMS ThermApparel Testimonials - Now I Can - Cool Stories From Cool Customers - Allison

#RIPUPMS ThermApparel Testimonials - Now I Can - Cool Stories from Cool Customers - Christina

STUDY: Risk of falls and gait: effectiveness of a physiotherapy circuit training on the walk function, quality of life and risk of falls in a multiple sclerosis patients

RIT Venture Creations technology business incubator launches four new companies

Road Trip

Rochester Sled Hockey Clinic with Rochester Accessible Adventures

Santa, Costume and Mascot Cooling Vests

Santa Ed Taylor wants some UnderCooling!

Santa Rick Rosenthal Reviews ThermApparel UnderCool Cooling Vests for Santas

Santas have more concentrations and less fatigue with ThermApparel Cooling Vest

Scratch and Dent Sale

Newsletter - September 2018

Simple Ways To Boost Your Immune System

Stay safe out there Carolinas

Stay safe out there Florida

Stay Warm, Stay Safe

STUDY: Cooling vests help MSers walk farther, longer

Summer Festivals

Summer Travel Safety Guide

Swag Shop

Help with Temperature Extremes and Extreme Heat for Chronic Illness

Testimonial - Carla Gene - North Carolina

Testimonial - George - Drag Boat Racing

Testimonial "I am a more productive mother" - Sarah

Testimonial - "I had a Cooling Plan and it worked!" - Annamarie

Testimonial - Jenny - Cooling Vest for MS and horseback riding

Testimonial - LupusChick and ThermApparel

Testimonial - Marnie- Cooling Vest for MS, Costumes and Muppets

Testimonial - Megan at Unstrung Studios Reviews her ThermApparel UnderCool Cooling Vest for POTS

Testimonial - My Cooling Vest Made All The Difference

Testimonial of Cooling Vest from Ruth - Now I Can

Testimonial - Toni - Michigan - Now I Can

Testimonials Now I Can - Cool Stories from Cool Customers - Ben

Testimonials: Now I Can Cycle

Testimonials - Now I Can Garden

Testimonials - UnderCool Cooling Vest changed my life


The Best Cooling Vest for Weddings

The Best Cooling Vest - FUMS and ThermApparel talk about The Best Cooling Vest

The Importance of Self-advocacy

The Summer Bucket List

The UnderCool Cooling Vest provides relief for Dysautonomia and POTS temperature and heat sensitivity related symptoms.

The World's Most Accessible Travel Destinations

There's fear and then there's FEAR.

ThermApparel Announced as Finalist for Digital Rochester's GREAT Awards

ThermApparel at Bike MS

ThermApparel at Imagine RIT

ThermApparel Celebrates its 5th Anniversary!

ThermApparel Testimonial Customer Gene Caffrey on Amazing Americans

ThermApparel is in the movie Bobcat Moretti

ThermApparel Testimonials - Now I Can - Cool Stories from Cool Customers - Kim Wagg

ThermApparel Testimonials - Now I Can - Cool Stories from Cool Customers - Tiffany Tallent and Major Tom

ThermApparel UnderCool 3.0 Cooling Vest

ThermApparel Wins 2nd Place at 2015 Effective Access Technology Conference

ThermApparel Wins 2nd Place at RIT's Tiger Tank

ThermApparel Wins Al Sigl Award at Imagine RIT

Things I can do in a cooling vest. #NationalKiteFlyingDay

Tips and Tricks for switching out extra Cooling Packs that come with the Festival and Adventure Bundles without taking your shirt off.

Tips for Applying to A Cooling Program for Financial Assistance with a Cooling Vest

Tips for Filing an Appeal Letter for A Cooling Vest

3 Tips For Reshaping PCM Cooling Packs

What to Know About Extreme Heat

Blogs we love: Health Central: Tips on How to Manage Your MS in Hot Weather


Top Tip - How to get your velcro perfect on your ThermApparel UnderCool Cooling Vest everytime

Unboxing ThermApparel Cooling Vests and Surviving concerts with POTS by Chronically Salty

UnderCool 2.0 Cooling Vest in Action

UnderCool 2.0 The New Version of Cool is Here

UnderCool Cooling Vest is a "game changer" according to Dave Bexfield from ActiveMSers

Understanding a new MS diagnosis

UVB rays (SUNLIGHT) may lower your risk of MS by 45%

Veterans and Multiple Sclerosis

What are the signs of heat related illness?

Blogs we love: My MS Team: What Causes MS?

What goes in a Coronavirus Summer Toolkit

What is Heat Exhaustion?

What is Phase Change Material?

What is #RIPUPMS?

What is the difference between SlimCool and ExtendedCool Cooling Packs?

What makes the CoolSleeves your next favorite cooling accessory and 3 great uses.

How many years will my UnderCool Cooling Vest last me?

Who Gets MS?

Will it be a Bones or No Bones Day? ThermApparel has a new spirit animal

Work Out Smarter, Not Harder

World Health Day 2021 Building a Fairer Healthier World

XXL Cooling Vest


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Frequently Asked Questions

Are my straps too long?

Are PCMs safe?

Are they recyclable?

Can I take it on a plane?

Can I take them in a cooler to my event?

Can I wear a bra?

Can I wear it over my shirt?

Can I wear it under a costume for theatre or movies?

Can I wear it under my fire suit in my racecar?

Can I wear it under my Santa suit?

Can they be left in the freezer?

Do I have to soak them?

Do you sell the Cooling Packs only?

Do you sell the Vest Garment only?

Do you ship outside the USA?

How can I fix lumpy Cooling Packs?

How do I care for my Cooling Packs?

How do I clean up a broken Cooling Pack?

How do I find the correct size?

How do I insert the cooling packs?

How do PCMs work?

How do set up a return?

How do set up an exchange?

How do they recharge?

How does a cooling vest work?

How does it work?

How does the Vest Garment Work?

How long do they last?

How long do they take to refreeze?

How long does it last each time I use it?

How many times can I wear it before purchasing a new one?

How much does it weigh?

How to fix lumpy Cooling Packs.

How to get the most benefit.

How to store in the off-season.

How tough are they?

I am going camping with no electricity. How do I recharge the Cooling Packs?

I can’t afford it, what should I do?

I have Lupus. Will UnderCool work for me?

I have POTS. Will UnderCool work for me?

Is it covered by Insurance?

Is it machine washable?

Is it uncomfortable?

Is there a difference between Mens and Womens?

My waist measurement is in between two sizes. Which size should I order?

What are the 4 different types of cooling vests?

What are the physical benefits?

What are the symptoms of heat intolerance?

What do I do if a Cooling Pack breaks?

What do I do if my Cooling Packs look damaged?

What do I need to know before ordering?

What does shipping cost?

What if the ThermApparel UnderCool Cooling Vest just doesn't work for me?

What is heat intolerance?

What is PCM?

What is the difference between ExtendedCool and SlimCool?

Where can I try on UnderCool?

Who benefits?

Who suffers from heat intolerance and what causes it?

Why are the Cooling Packs so hard to insert?

Why are ThermApparel Cooling Packs the best choice?

Why are they not as cold as other cooling packs?

Why do I need an extra set?

Why does it cost more?

Why does my body overheat?

Why doesn't my UnderCool seem cold?

Why don't my Cooling Packs feel cold?

Why is ThermApparel the best cooling vest on the market?

Will it make me look funny?

Will it "sweat" or will I feel "wet"?

Will people know I am wearing it?

Financial Assistance

User Guide

Insurance Coverage

Recycling Program

Returns and Exchanges

Shipping Policy

Sizing Guide


Whats your #HeatIQ?

Santa John 631




CoolSleeve Pair

Extender Panel

Extra Garments

CoolSleeve Pair Garment Only

Extra UnderCool 3 Vest

Headband Garment Only

RallyWrap Garment Only

UltraCool Garment Only

Extra Packs

Extra UnderCool Cooling Packs

Extra CoolSleeve Cooling Packs

Extra Headband Cooling Packs

Extra RallyWrap Cooling Packs

Extra UltraCool Cooling Packs

Gift Card

Grab N Go Cooling Pack


Cooling Pack Recycling Program


Scratch & Dent Sale

Scratch And Dent 2.0

Scratch and Dent 3.0

ThermApparel Tee


UnderCool 2.0

UnderCool 3

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Now I Can

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Why We're Different

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Questions about our vests or shipping? Reach out to the ThermApparel team toll-free at 855-232-7233, write to us through our website’s contact form or chat with us via live chat. We always respond because, otherwise, that wouldn't be cool.