Marmot Men's Size Chart Premium performance plus earth-conscious packaging combine in this essential base layer. Quick drying and moisture wicking, this underwear features a jewel harness which prevents chafing, keeping you comfortable during intense climbs and treks while offering a more relaxed fit. Antimicrobial Polygiene, a Bluesign(R)-approved silver salt fabric treatment, prevents odor-causing bacteria so you feel fresh. Features: - Athletic Fit - Ultra Lightweight Recycled Fabric That is Quick-Drying and Moisture Wicking - Antimicrobial Treatment Reduces Odor in Fabric - 100% Polyester (82.6% recycled yarn), Interlock Knit, 3.5 oz/yd