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Extra CoolSleeve Cooling Packs

$40.00
$40.00 $40.00
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Refresh your ThermApparel CoolSleeves with a new set of cooling packs.

These lightweight CoolSleeve66 cooling packs sit directly over the radial artery at your wrist and forearm. T

Think of it like a heat exchanger: the packs pull heat out of the blood flowing through the artery, and your body circulates that cooled blood back through your entire system, bringing your core temperature down from the inside out and cooling you head to toe.

They freeze safely above skin temperature, recharge fast, and deliver dry, comfortable cooling in both dry and humid heat.

This package includes:

  • 2 CoolSleeve66 Cooling Packs

Key Features

  • Replacement cooling packs for ThermApparel CoolSleeves
  • Freezes around 66-70°F (19-21°C) for safe, comfortable skin contact (not ice-cold)
  • Each pack is approximately 7" x 2.5" for a slim, low-bulk fit in the sleeve pocket
  • Works in both humid and dry heat for reliable cooling outdoors or on the job
  • Fast recharge: about 15 minutes in ice water, 45 minutes in the fridge, or 60 minutes in the freezer
  • Non-toxic, bio-based PCM that is biodegradable and reusable thousands of times

Learn more about how our cooling packs work in our cooling pack guide.
Two CoolSleeve Cooling Packs on a white background
$40.00
$40.00 $40.00
  • Reduce Fatigue
  • Maintain Cognitive Focus
  • Improve Performance and endurance
  • Minimize risk of heat related Injury
  • Go about your day with no one knowing your wearing it (UnderCool 3 only)
  • Works great in humid and dry conditions
  • Cooling that lasts between x-y hours
  • Feels great
  • Recharges in less than 1 hour
  • Lightweight (UnderCool 3, Headband, CoolSleeve only)
  • Non-Toxic Bio Based
  • NOT ICE
  • Freezes at 70F (21C) so it is safe against skin
  • Works in humid and dry conditions
  • Recharge in 15-60 minutes
  • Won’t condensate so you will stay dry
  • Can be used 1000’s of times for around 3 years
  • Easy to Use gif from home page
  • Freeze times fridge, freezer, icewater
  • Reuse 1000’s of times
  • Washing instructions for garment
  • Cooling pack care

What clients say

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Why We're Better

  • Evaporative Cooling

    • Doesn't work in humidity
    • Cools your skin, NOT your core directly
    • Lightweight & Flexible
    • Must be wet

  • Our PCM Cooling System

    • Works in any climate
    • Cools your core body temp
    • Lightweight & flexible
    • Dry conformal cooling

  • Gel & Ice Cooling

    • Works in any climate
    • Too cold for direct skin contact
    • Heavy & rigid
    • Wet from condensation