The Terramar Kid's Microthermal Midweight Crew shirt is a great base layer for cold weather outdoor fun, such as hiking and snow sports. The engineered, dual layer micro polyester knit delivers exceptional warmth. A soft brushed Body Sensors filament inner layer rapidly transports moisture from the skin to the outer layer, to keep kids warm and dry during highly aerobic outdoor activities. Constructed of 100% micro polyester dual layer thermal knit fabric. Ec2 Qwik Dri thermoregulation comfort technology is an electrostatic process that allows for moisture movement without the garment touching the skin. Body Sensors brushed surface creates additional air trapping warmth, breathes well, and dries fast to enhance moisture transport. Anti microbial treatment for odor control. Saddle shoulders for complete mobility. 1x1 rib crew neck and cuffs with spandex. Flat seam construction for comfort and durability soft and non chafing next to skin. Fabric provides UPF 20 sun protection, shielding skin from harmful ultraviolet rays. Drop contoured back hem stays tucked in increased coverage for active sports. Tagless to feel soft against your skin. Import.