Companies in the snake bite protection arena, boot and gaiter or chaps do not guarantee bite proof. Materials used for snake bite resistance include leather, turtleskin, viper cloth( believe this is cordura1000d) rubber and plastic panels. One well regarded company long in the business, Russell recently said online that their boots should not be used for bite protection presumably for liability concerns. Turtleskin gaiters are 2 layers of their proprietary material, others commonly use 2 layers of 1000d cordura or plastic panels. Snake boots use similar construction with cordura or turtleskin and leather or leather that may be one or two layers. Bites from vipers are complex with dry bites occurring as well as envenomation, the latter can have variability in volume of venom. Loose fitting clothing has protected some victims as the venom was deposited on the surface of the clothing. Simple leather boots have protected many people.