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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. Fill out the form below and we will send you a FitKit!

 

 

NEW SIZING!! UnderCool 3.0 Sizing Guide

3.0 Sizing Tip: If you are in between 2 sizes order the LARGER size. 

Size Natural Waist
Extra Extra Small - XXS  18" - 24"

46 cm - 61 cm

Small

 24" - 31"

61 cm - 78 cm
Medium

 31" - 40"

78 cm - 101 cm
Large

 40" - 51"

 101 cm - 129 cm
Extra Extra Large - XXL 51" - 64"

129 cm - 162 cm

Sizing Tips for 3.0:

  • Sizing is based on your natural waist, not your hips or pant size. 
  • Measure against your skin.
  • 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. 
  • If you are in between 2 sizes, order the Larger size.

 

UnderCool 2.0 Sizing Guide

Size Natural Waist
Extra Extra Small - XXS  20" - 24"

51 cm - 61 cm

Extra Small  25" - 28"
 

 61 cm - 71 cm

Small

 29" - 34"

71 cm - 81 cm
Medium

 35" - 40"

 86 cm - 97 cm
Large

 41" - 46"

 102 cm - 116 cm
Extra Large - XL

 47" - 55"

 121 cm - 132 cm
Extra Extra Large - XXL 56" - 61"

140 cm - 152 cm

Sizing Tips for 2.0:

  • Sizing is based on your natural waist, not your hips or pant size. 
  • Measure against your skin.
  • 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. \
  • If you are in between 2 sizes, order the smaller size.

Womens Sizing Guide:

  • Sizing is dependent on natural waist size not bust size.

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

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.

Don’t Have a Fabric Measuring Tape?

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

 

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.