3mm Neoprene hood provides head protection for cold water activities. Exclusive XSpan, a 250% 4-way super stretch neoprene, allows this hood to be very soft and extremely comfortable. Glued and blind stitched seams are waterproof, provide durability and will not chafe. A flow vent located on the top of the hood helps to minimize ballooning. The bib is constructed of a 2mm XSpan neoprene, allowing for easy movement. Comfortable, anatomically correct and constructed with the finest techniques and materials make this hood a critical garment for your cold water activities.Exclusive XSPAN material - 250% 4-way super stretch neoprene material Waterproof glued and blind-stitched seams provide durability without chafing Hood mounted flow vent minimizes ballooning Trimable skin material face seal 3mm hood/2mm bib provide the perfect balance between protection and comfort.