The sling bag is made mainly from the scrap material of our clothing line. So the materials vary from Hemp to Organic cotton,to Tencel. All bags are mixed colors, and change from season to season. This round are olive and chocolate color combo. It has an adjustable sling strap and is great for bike riding or walking. The strap closure is velcro. This sling bag is equipped with many pockets: One large front pocket zippered, one side pocket velcroed, and inside pocket, and a strap pocket for your phone or digital device. Rust orange sling bag is currently out of stock. One size fits most.