Hot Chillys Men's Alpaca Bottom 75% Polyester/ 25% Alpaca Made in the USA and Imported Naturally transports moisture away from the body, resists odor and is antimicrobial Relaxed Fit for Comfort and Warmth Covered elastic waistband and Fly Flat seaming in key areas to reduce bulk and abrasion Brushed-back fabric for added softness against the skin