Volcom Fieldblazer (Youth)5mm CR flex-foam bootie construction is 100% waterproof.Four-way stretch nylon upper is lightweight and flexible.Stretch-fit topline binding helps keep the boot snug on your calf and keeps the cold and wet out.Vulcanized natural rubber upper overlays help form a durable and lightweight shell.Breathable air mesh lining wicks away humidity and perspiration.6mm NITRACEL™ EVA footbed is removable.Diamond tread self-cleaning outsole wraps the perimeter for protection and stability.Rubber shell and nylon upper are durable and easy to clean.Comfort range of sub-freezing conditions to 85°.Measurements:Weight: 1 lb 2 ozCircumference: 12 inShaft: 7 inProduct measurements were taken using size 1 Youth. Please note that measurements may vary by size.