SmartWool Men's PhD 5" Shorts - Past Season Shell: 86% Polyester, 14% Elastane; Liner: 54% Merino Wool, 46% Polyester; Pocket Bag: 100% Polyester Knit in Vietnam Fitted internal brief provides thermoregulation, odor management, comfort and dries quickly Lightweight stretch-woven outer short with supportive Merino/polyester brief inside Striped drawcord for customizable waist fit - 360 reflectivity for visibility Secure back zip pocket and drop-in pocket on right side for additional storage Machine Wash Warm, Gentle Cycle Wash With Similar Color Do Not Bleach Tumble Dry LOW Cool Iron When Needed Or Dry Clean - For best appearance, wash garment inside out and flat/line dry.