<p>Thermal bottoms with Stretchy Cotton Fleece Lined Fabric; Double Layer Pouch with Functional Fly; Additional Crotch Lined; Perfect undergarment to wear indoors and outdoor as base layer under your pants.</p> <p><b>Stretchy Cotton Fleece Lined Fabric</b></p> <p>Made from premium cotton fleece lined fabric, this ultra-soft microfiber comfort fits thermal bottom with fleece lined inside for added warmth and thermal insulation. Perfect undergarment for an extra layer of warmth under your pants. </p> <p><b>Heat-Retention</b></p> <p>Thermal pants with spandex added for extra stretch and shape retention. Close-fitting style does better in keeping you warm and blocking the cold outside air. </p> <p><b>Double Layer Pouch with Functional Fly</b></p> <p> Curved cut ergonomic pouch offers you the perfect amount of space to move freely; Functional fly for easy-going when nature calls</p> <p><b>Best Gift</b></p> <p>With delicate outer packing, the thermal bottoms for men is the warmest present for your beloved father or husband in the cold winter.</p>