The Merino Lined Dry Suit Hood is the warmest hood available, and will keep a Dry Suit Diver"s Head Warm and Comfortable in even the most Severe Water Temperatures. The Hood is constructed from 5 mm Titanium Lined Nylon ll Elastiprene Neoprene throughout the Head and Neck Areas, with Pinnacles patented Merino Lining throughout. Merino-Lining adds up to 35% more Thermal Efficiency then Standard Neoprene Rubber alone. Merino also does not promote the Growth-of-Bacteria, making it Hygienic and Reduces Odor. The Hoods Seams are Double Glued and Flat-Lock Stitched for Strength and Durability. The Hood is equipped with a 5 mm Face Seal with Smooth Skin-In Seal can be Trimmed to Custom Fit the Face Mask Seal. Hood has a Non-Direct Automatic Vent that allows Air-to-Escape as necessary from the Top-of- the-Hood while Restricting Water to Re-Enter. Donning and Doffing are made Easy with the Gusseted Rear Zipper Closure. Hood is Black in color and is covered by a 12 month limited warranty.