Don't get cold - layer up! The PolarMAX Base Layer Basics Crew features Acclimate Dry fabric containing microfibers that are cuddly soft to keep you toasty and dry during any outdoor cold weather activity. The Base Layer Basics brand exclusively features perma-wick performance fabrics that won't shrink, pill, fade, or lose their shape. These fabrics stretch more efficiently, allowing for high energy activities. Perma-wick dry performance fabrics wick moisture from the skin to the fabrics' outer surface and dries rapidly, leabing you warm, dry, and comfortable! FEATURES: Breathable Fabric Midweight Performance First or Second Layer - Relaxed Fitting Weight - 6.0 oz 100% Acclimate® Dry Polyester Superior Acclimate® Dry Moisture-Wicking Intense Quick Drying Acclimate® Fresh Anti-Microbial Protection Clean Seam® Next-To-Skin Comfort CARE: Machine wash warm. Tumble Dry low. Do not bleach. Do not use fabric softener. Do not iron.