OMS SuperfFlex 2.5mm Neoprene Hood Size Medium A20118004 OMS SFH SuperFlex Neoprene Hoods re-define Comfort & Warmth. Super Soft Highly Flexible Neoprene Double Lined with Superstretch Jersey Nylon both internal & externally. Seams are glued fist, then Dry-Stitched for maximum Strength and Warmth. Flexible Smoothskin Face Seal minimises Water ingress & flow, ensuring your head stays warm during your Dive. 2.5mm thick for use in Warmer Waters� Size Medium. � Available in 5 Sizes and 3 thicknesses to suit all climates.