This is the 4th Element 5mm Neoprene Hood for Scuba Diving Features: Simple Minimalist Design Stretch Neoprene to Ensure Comfortable Fit Micro Holes in Hood: Vent Air with Minimal Water Ingress Seams: Glued and Sewn Collar Designed to Work with Dry Suits Fitted with Warm Neck Bib Glide-Skin Interior, Minimize Flow of Water Nylon 2 Neoprene Design The 4th Element 5mm hoods have a simple minimalist design with a smooth Glideskin interior and are produced using stretch neoprene to ensure a comfortable fit. The short collar works for both dry and wet suits, and micro holes in hood vent air with minimal water ingress.