The main body is constructed from a polyester thread that satisfies the CORDURA®brand fabric standard, with excellent resistance against friction. The surface is treated with Teflon® to ensure water repellence. The attached leather fixtures and fittings have undergone a NISSENKEN testing to ensure the absence of harmful chemicals and dyes. The surface of the leather has a natural gloss feel achieved through a hand-processing by the craftsmen who iron and buff the leather. Improvements from version1 include a lighter fabric, high visibility mesh pockets and the addition of PC storage space in the backpack and tote.