O'Neill Women's Flair 4/3mm Back Zip Full Wetsuit UltraFlex, ultra stretch, super soft neoprene for superior feel, flexibility, durability and high performance FluidFlex Firewall, measurably warmer, lighter and windproof exterior with water wicking interior thermal jersey layer Fluid Seam Weld, 8mm silicone-based urethane sealed exterior with a triple glued and blind stitched interior. Watertight, durable and ultra flexible seam Single Fluid Seam Weld (Watertight Technology), Plasma Wrist and Ankle Seals Krypto Knee Padz, Chest/Back: FluidFlex Smoothskin, Arms/Shoulders/Lower Body: UltraFlex