Boot Height: Approx. 10'' Tall. The Alpha Iceman winter pac boots are guaranteed to keep feet warm and cozy in the coldest conditions. Alpha Soft Shell technology provides warm, lightweight, waterproof comfort. 5mm of naturally insulating neoprene combine with 400 G. Thinsulate Ultra Insulation and a removable 9mm wool liner for added protection against the cold. The high-abrasion, blown rubber bottom is 100% waterproof, making these boots perfect for cold, wet conditions.