Marmot Men's Midweight Crew Long Sleeve PolartecPower Dry 96% Polyester (29% Cocona), 4% Elastane Midweight 4.2 oz/yd Imported Quick-Drying and Wicking Polartec Power Dry with Cocona Performance Technology Marmot UpCycle Product with Recycled Polyester Cocona for Natural Odor Protection Stretch for Increased range of motion