Outers are made from 1000 denier nylon Cordura fabric for maximum durability. Inserts made from plastic polypropylene board for 100 % snakebite resistance. Unique toe cover over the lacing area to prevent snake fangs from becoming tangled in shoe/boot laces. All-round protection from ankle to knee from snake bites as well as other sharp objects like thorns. Extra length straps with high quality Nexus Fastex side release buckles.