Waterproof"s Body-Tec Single Layer Top and Pants (Pants see SKU: WPGUBTP) are perfect for both use as Surface Underwear or Sleepwear at Base Camp and Underwater for Thermal Protection when Diving. Either way the Body-Tec provides Excellent Layering Technology for the Most-Demanding Environments. Made from 260g (9.17oz) 90% Polyester/10% Spandex Fleece Blend Fabric that will keep you warm even when wet. Available as separate Top and Pants for sizing Flexibility the Top has an Extended Tail that prevents Ride Up" during the dive. Top is equipped with Thumb Loops for Easy Donning of Exposure Suit over the Garment. The Body-Tec Undergarment is great for Moderate Temperature Use by itself or combine with Waterproof"s Warm-Tec (see SKU: WPGUWT2) Undergarment for Extreme Protection. The Body-Tec Undergarment is recommended for use with the D1 Hybrid Dry Suit (see SKU: WPGD1H). The Dual Layer provides enhanced features in a very Low Bulk Garment. Warmer due to the Two-Layers of Fibers, the Dual Layer also provides Extra Comfort since the Wicking keeps your Skin Dry an important feature to keep you warmer during a Dry Suit Dive. The Dual Layer Body-Tec works great with Waterproof"s D1 Hybrid or D10 Pro ISS Dry Suits (see SKU"s: WPGD1H or WPGD10PM). Both Garments have Flat-Locked Stitched Seams for Strength and Durability. The Waterproof Body-Tec Undergarments are Black in Color, available in Multiple Sizes and are covered by a 24 month limited warranty.