ColdPruf Women's Authentic Dual Layer Bottom 100% Cotton Inside, 65% Cotton/25% Merino Wool/10% Nylon Imported Two-layer engineering with Merino Wool, traps body heat between layers, resulting in chill-blocking warmth Off-white pant sits at natural waistline. Front and back rise provides an exceptionally comfortable fit and maintains coverage during various activities Tagless labeling, non-itch waistband and gussets for added durability and comfortable fit Fits loose on the body, generous cut for full range of motion Perfect as a base layer. Best for dressing with minimal layers in very cold to extreme cold weather and low to medium activity levels