Made for extreme expedition, the Polarmax Core 4.0 Mock Zip Long Underwear Top will protect your core and get you to your goals. Made from 92% Polyester and 8% Lycra, this top has unmatched stretch for unlimited mobility. The tech face front adds durability, while the fleece liner offer a next-to-skin softness to cozy up. The Core 4.0 will keep you dry, warm and comfortable, when the temperatures drop! AcclimateDry Technology, 92% Polyester and 8% Lycra, Quick Drying and Moisture Wicking, Anatomical Body Shape w/High Stretch, Tech Face Front w/Fleece Liner, Fit: Tight, Material: Synthetic, Weight: Heavy, Type: Top, Water Resistant: Yes, Recommended Use: Snow, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2020, Product ID: 566090, Model Number: 5P11D 066 S, GTIN: 0785146574423