Bluesign® certified fabric offers body-mapped gridded fleece for insulation where it’s needed most. The half-zip design provides quick access to ventilation and makes it easy to get in and out. Flat-locked seams create next-to-skin comfort and eliminate any irritation points. The underarm and crotch gussets allow for greater mobility. The Men’s Kazan Drysuit Liner provides a robust thermal system for in-water performance and warmth when paired with Mustang Survival dry suits and waterproof outerwear. The low collar accommodates neck seals to ensure the water stays out.