deps Thermal Long Sleeve & Thermal Tights Brand New The thermal fabric used in military underwear stores warm air in the waffle-like recesses, creating an insulating layer that provides warmth. It also retains body heat while releasing excess moisture, maintaining comfortable warmth. The uneven fabric has less contact with the skin and a gentle feel, with high elasticity and a moderate fit to the body. Perfect as underwear for winter fishing trips, or as an inner layer for layered styles. Thermal Long Sleeve The tightly packed crew neck and ribbed cuffs prevent warmth from escaping. The hem is not folded over, so it is not thick and easy to tuck in. Thermal Tights The hem has a ribbed design, making it less likely to stretch and trapping warmth. The waist elastic has the deps logo.