Need Help With Sizing?

We have just the thing. The ThermApparel Fit Kit is loaded with tips and suggestions and a handy measuring tape so you will get the correct size when you order. Want a free FitKit sent to you? Fill out the form call 855-232-7233, email contact.us@themapparel.com, or live chat and we will pop it in the mail. 

Need just the sizing charts? Check out our sizing page or look below. 

Sizing Tips:

1. Sizing for your ThermApparel UnderCool Cooling Vest is really important because it's based on your natural waist. It’s very simple to find your natural waist and you can do it one of two ways.

2. Stand or sit up nice and tall and bend to the side, where your body naturally creases is your natural waist. Think of the “I'm a Little Teapot” song …” tip me over and pour me out”…right, where you crease, is where you want to measure.

• You can find your natural waist in the area below your rib cage but above your belly button. Right in the center part of your abdomen, in the narrower part where your body naturally narrows
• Sizing is based on your natural waist, not your hips or pant size. 
• Measure against your skin.
• Avoid using anything that has stretch to measure with.
• Take your measurements in front of a mirror.
• Make sure your tape measure is level on both sides. 
• UnderCool needs to fit your body like a glove to give you the best cooling support.
• You will wear a size smaller than you think. 

Womens Sizing Guide:

• Sizing is dependent on natural waist size not bust size.
• You will wear a smaller size than you think. 

1. Stand or sit up
straight and tall.

2. Bend at both sides.
Where you naturally
bend in your natural
waist.

3. Measure where you bend. If you don't bend measure below rib cage but above belly button.

Men's Sizing Guide:

• We recommend ordering a size smaller than your usual T-shirt size.
• (If you wear a large T-shirt, a medium UnderCool will fit best.)
• Sizing is dependent on your natural waist size, not hip or belt size
• You will wear a smaller size than you think. 

1. Stand or sit up
straight and tall.

2. Bend at both sides.
Where you naturally
bend in your natural
waist.

3. Measure where you bend. If you don't bend measure below rib cage but above belly button.

SIZING FAQ

Q: I Don’t Have a Fabric Measuring Tape.

Q: You can measure your waist the same way with a straight ruler and:
String / Yarn
Dental Floss
Shoelace
Charging cord from your phone

Q: I got my vest but it doesn't seem to be working, do I have the wrong size?

A: When you get your vest try it on with the packs frozen. Ask yourself these questions.

• Can I feel all 4 cooling packs on my back?

• If I had one more row of velcro would it fit better?

• Is there any space between my back and the cooling packs?

• Are the cooling packs too low?

If you answered yes to any of these questions, then yes you most likely have the wrong size. 

Q: I have the wrong size. How do I exchange it for a different size?

A: Call us at 855-232-7233, so we can email you the exchange form and a USPS pre-paid shipping label. You can drop off your return at any USPS Postal Service™ facility or mail it directly from your home. No printer? We can mail the label to you. Visit our returns and exchanges page for complete details.

If you have any questions about sizing please call 855-232-7233, live chat with us on our website or send us an email. We are happy to help.