Size Guide

The size charts below detail the relevant sizing or points of measurement for all of our products. Our garments do not need to be tight and against the skin for our infrared technology to work, so we suggest fitting to your personal preference. If you are looking for a looser fit, then size up from the guide's suggestions.

Unisex Sizes

K-Mask: Head Circumference

S45cm - 55cmM50cm - 60cmL55cm - 65cm


Socks & Sleeves Foot Size

S3 - 5M6 - 8L9 - 11


Socks & Sleeves Calf Size

S34 cm - 39 cmM37 cm - 42 cmL40 cm - 45 cm



XS17 cmS17.5 cmM18 cmL18.5 cmXL19 cm


Gloves (when worn as a liner)

XS17.5 cmS18 cmM18.5 cmL19 cmXL20 cm

Gloves measure from the point of the wrist to the end of the middle finger.

Women's Sizes



Leggings & Shorts



Men’s Sizes

Top (Chest)

XS34" - 38"S36” - 38″M38″ - 40”L40″ - 42”XL42“ - 44”XXL46″ - 48”

Leggings & Shorts (Waist)


Leggings (Inner Leg)

XS27" - 28"S28” - 30"M30” - 32"L32” - 34"XL34”XXL34"