For protection against rattlesnake strikes, this tough exterior is layered with a durable full rubber coating along with 4mm of neoprene while Muck Boots' exclusive XpressCool fabric lining keeps a hunter's feet cool and comfortable in warmer weather. The end result is a briar resistant durable boot, that's cool enough to confidently hunt in warm regions of the country where snakes often pose a threat. Material: 100% Rubber.