Every Kuhane wetsuit is a three-layer system:
Exterior: Yamamoto Greenwave™ #2080 jersey (plant-based nylon, 500% stretch) on the K2H and New Lycra on the K1 and K1H.
Core: Yamamoto #40 neoprene from Japanese limestone, with 93% closed cells and 99.7% waterproof: it holds heat and doesn't absorb water.
Interior: Metallic on the K2H (a thermal lining that returns heat to the body) and Kumo on the K1 and K1H (an ultra-soft lining). Both are exclusive to Kuhane.
Seams are GBS (glued and blind-stitched); the K2H adds exterior liquid seal.