deps Thermal Long Sleeve & Thermal Tights New, unused items The thermal fabric used in military underwear utilizes the recessed waffle-like sections to trap body heat and create an air layer, thereby providing insulation. It also retains body heat while releasing excess moisture, ensuring comfortable warmth. The textured fabric, with its raised and lowered surfaces, has less contact with the skin, offering a gentle feel. It is also highly elastic and fits the body snugly. These can be used not only as underwear for winter fishing trips but also as an inner layer for layered styles. Thermal Long Sleeve The tightly knit crew neck and ribbed cuffs prevent warmth from escaping. The hem is not folded, so it is thin and easy to tuck in. Thermal Tights The hem is ribbed, making it resistant to stretching and trapping warmth. The waistband features the deps logo.