Every Part of Life
is an Extreme Sport

WORK HARD WORK SLEEP TRAIN RELAX PLAY
37.5® TECHNOLOGY HELPS CONTROL YOUR CORE TEMP
NO MATTER THE ACTIVITY OR WEATHER

CONSIDERING DOPING? WE CAN HELP.

FIND OUT MORE

WARM UP &

COOL DOWN

37.5® Technology helps keep your body at the ideal core temperature of 37.5° Celsius and helps keep the microclimate next to your skin at the ideal relative humidity of 37.5%. When you’re hot, patented active particles

embedded in the material remove sweat in the vapor stage before liquid sweat forms, cooling you down. When you’re cold, those same active particles trap your energy to help warm you up.

CANNES LIONS AWARD-WINNING CLIFFSIDE SHOP

HOW IT STARTED

37.5 Technology was created by Dr. Gregory Haggquist, a Ph.D. photo-physical chemist and inventor. In 1992, while Dr. Haggquist was in Japan on a JSPS postdoctoral fellowship, he was taken to the volcanic sand baths on Mt. Aso. At first, he thought he would only be able to stand the heat for a few minutes, but once buried in the sand he found it not to be hot but comfortable. So comfortable he stayed in the sand for an hour. What he realized is comfort comes from balance, a balance between heat gain and heat loss. The volcanic sand was removing the sweat vapor from his skin so fast that he was continually cooled by sweat evaporation. This was the moment of clarity, when Dr. Haggquist understood that removing the sweat vapor before it turns to liquid sweat was key to comfort. While others were focused on wicking—spreading liquid sweat on fabric—Haggquist focused on reducing humidity next to skin to maximize evaporate cooling. And it turned out by enhancing comfort human performance was increased by reducing core temperature buildup. Now you too can experience the same phenomena volcanic sand bath experience when wearing apparel and footwear made with 37.5 technology.