This is the Bare Men&';s Super Hi-Loft Polarwear Extreme Drysuit Undergarment Features: Our warmest drysuit insulation option Ribbed knit cuffs & collar for secure comfort and fit Hand warmer pockets Foot stirrups and thumb loops for donning ease Grommets positioned for air exhaust and moisture venting Articulated knees Chest pocket with zipper Extra long front zipper HYDROSTRETCH panels for ease of movement LUMBARE-X-TENDER panel in lower back Super plush and super warm, this underwear offers a double layer of Hi-Loft Thinsulate in the torso for extreme cold water diving. If you find that you tend to get cold quickly, this is the drysuit underwear for you. Material: Super soft Rip Stop nylon exterior with Double Hi-Loft THINSULATE (14.8oz/yd2 / 500g/m2) insulated interior in torso and Single Hi-Loft (7.4oz/yd2 / 250g/m2) in arms and legs.