2025 Update: Thermosleeve shirts have a generous cut. If you are between sizes or are having a hard time deciding on two sizes, I recommend going with the smaller size. **XL Shirts are sold out.**

This is a cool and cold weather shirt like nothing available anywhere else. This shirt will change the way you think about staying warm and dry in cool and cold weather. 

The torso material of the Thermosleeve wicks away sweat and dries quickly so you stay cool and comfortable all day. The Thermosleeve torso is an ultra-light, smooth fabric that is light weight and smooth on your skin. The material feels cool to the touch and can slide easily under body armor to reduce sweating, rashes, and chafing. The torso is 78% Micro Nylon / 22% Lycra and weights only 3.2 oz per square yard that feels very soft and light.

The fabric that makes up the arms of the Thermosleeve keeps you amazingly warm without piling on the weight. The brushed exterior provides loft to trap warm air against the arms while remaining flat on the skin to avoid bulk and bunching up under your long sleeve shirt or other outerwear. It is thicker and heavier than the torso material, but still thin enough to easily wear under any long sleeve shirt. This fabric is an ultra-warm, fabric with smooth interior to easily slide on and off while providing a chafe-free flatlock seam construction.
Arm fabric is 78% polyester / 10% Cotton / 12% Spandex and weights 8.9 oz. per square yard. 

Care Instructions: Machine Wash Cold or Hand Wash, No Iron, No Bleach, Tumble-Low Dry or Lay Flat to Dry

DESIGNED, CUT, AND ASSEMBLED IN THE USA 

If you are possibly between sizes, go with the smaller size. Many people who would normally buy an XL will fit well in a large Thermosleeve.