O'Neill - Heat Socks For Swimming- 3mm Double Lined - 0041

O'Neill 3mm Boots – Black | Model 0041 (2026) The O'Neill boot line continues to impress, reflecting expertly designed features and the attention to detail you've come to expect from O'Neill. Built for cold-water sessions without the bulk. The Details: 3mm neoprene for cold-water insulation Low bulk protection — warmth without sacrificing feel Fluid Foam Neoprene for flexibility and durability Anti-flush shin strap to keep water out and warmth in Torsion control forefoot for improved board feel and stability Sizing (UK): XS = UK 4/5 SM = UK 6/7 ME = UK 8/9 LG = UK 10/11 XL = UK 12/13 Fit: Snug performance fit. If between sizes, size up for thicker socks or a more relaxed feel. Boots should fit tightly with no excess room to prevent flushing. Care: Rinse with fresh water after every use and dry inside out away from direct heat. Do not machine wash, tumble dry, or iron. Store in a cool, dry place.