Terramar Ladies Silk Long Underwear Pants (Black XL) 100% Pure Filament Silk 2x2 Rib 100% Super Soft Pure Filament Jacquard Silk: Luxurious, soft, and breathable ec2 Qwik-Dri Thermoregulation Comfort Technology Natural warmth without bulk that creates an intricate pattern design Anti-microbial Covered elastic waistband