The Tatonka Strap Case M is a small accessory bag for glasses, electronics such as GPS etc. It is padded to protect the contents and has a wide all-round zip. The back of the bag also has a strap with a velcro fastener for universal attachment. This allows you to attach it lightly to your waist or shoulder strap, belts or anywhere else on your clothing or equipment and the contents remain well protected from knocks and dust.