The Volcom Ventral Pant is a light 2-layer shell that offers waterproof, breathable protection in all but the worst conditions. The special ergonomic fit gives you the freedom of movement to push your riding to the limits whilst critically taped seams & a stone butt patch give you extra durability where you need it. Features V-Science 2-Layer shell Critical taped seams Ergo fit Zip Tech Pant to jacket interface Mesh lined zip vents Stone butt patch Triple reinforced rise Adjustable inner waistband Hand warmer pockets V-Science boot gusset w/snap fastening Boot gaiter w/lace hook Stone ticket ring Back pockets Glossary Zip-Tech Zip-Tech technology means that you can zip the powder skirt of any Volcom jacket to any volcom pant. The system keeps the snow out & the heat in with no restriction of movement. Waterproof Rating: This is measured & expressed as Hydrostatic Head in millimetres (mm). To find out the Hydrostatic Head of a fabric the manufacturer will take a clear tube & clamp their material over the bottom end. They will then fill the tube slowly with water & watch to see how high the column of water can get before the material lets drips through. The higher the hydrostatic head, the better the water protection. The European Standard a fabric must meet to be classified as waterproof is a Hydrostatic Head rating of 1500mm, & on average, outerwear fabrics tend to have a hydrostatic head of 10000mm & above. Breathability Rating: Breathability is measured as a rating in grams of how much vapour a square metre of fabric will allow to pass through in 24 hours (g/m 2/24). It should be noted that breathable fabrics do not stop you sweating & care should be taken as to clothing worn beneath waterproof/breathable shells. High quality base layers & fleece or insulated midlayers should in themselves draw vapour from the body & pass it outwards, thus allowing the outer fabric to do its job. Cotton clothing should never be worn as part of a performance clothing layering system.