ColdPruf Men's Expedition Single Layer Bottom Heavyweight, single layer fleece base layer pant 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 Convenient functioning front fly Moisture management wicks perspiration and dries quickly Perfect as a base layer. Best used when dressing with minimal layers in very cold to extremely cold weather and medium to high activity levels