The OX Ultimate 1-Piece Leather & Nylon Construction Rig is tough, dependable, and comfortable. Constructed from a combination of 1680D ballistic nylon, memory foam and top-grain. Kevlar® is a key component to this set up. The rig includes Kevlar® reinforced double row stitching as well as Kevlar® reinforced pouch bottoms. This Kevlar® design allows this rig to handle the rigors of any jobsite.