This is a beautiful bag from a local company in Boston specialized in sophisticated and functional bags and eyewear. All their materials are organic and locally sourced. I have owned this bag one season, but am selling it because I'm no longer commuting on bike. It's in excellent condition, with a few pen marks in the main interior (shown in photos). There are no marks on the exterior or on the front pocket interior. The bag is constructed with two layers of organic cotton canvas, which is coated with a layer of wax, making it resistant to any weather. The cross-body strap is adjustable for the right or left shoulder and made with soft cotton webbing. We use high quality YKK zippers and premium solid brass hardware that has a nickel matte finish. Derby features a zippered, quick-access front pocket, large main compartment, and an interior laptop sleeve that can hold up to a 13” laptop. Details: Double layered organic cotton Outer layer is 16 oz fabric with a wax finish. YKK two-way, rust-proof zippers with leather pulls Interior laptop pocket to carry up to a 13” laptop Solid brass nickel matte coated hardware Soft touch 100% cotton webbing adjustable shoulder strap Interior key fob 9.25”L x 3"W x 14"H 6.36 liter capacity