You enjoy the warmth of a hood, but struggle with bulky neoprene hoods. They can make it tough to move and can make you feel claustrophobic by restricting your breathing. The Sharkskin Chillproof Hood is the perfect hood for you. It&';s Chillproof material is equivalent to 3mm of neoprene and will very efficiently recycle your body heat. The fleecy inside is extremely comfortable and won&';t tug at your hair like neoprene does. Lastly, its 4-way flex material gives the hood unrivaled flexibility, which means it won&';t restrict your breathing or movement and can easily be slid off your head and still be comfortable. Aquatic specific, windchill proof, 3-layer composite thermal material Neutrally buoyant, anti-microbial, odor and itch resistant Soft wicking fleece inner liner for warmth and comfort Skirt that can be tucked into a suit or top Size - FOREHEAD Inches XS: 18.3 - 19.1 inchesSM: 19.3 - 20.1 inchesMD: 20.3 - 21.1 inchesLG: 21.3 - 22 inchesXL: 22.2 - 23 inches2XL: 23.2 - 24 inches3XL: 24.2 - 25 inches