The optech usa snoot boot large black is a lens pouch that is cylindrical just like a lens the wide mouth opening makes it easy to retrieve a lens while the drawstring closure secures it tightly with a spring lock it can be attached to a belt or a d ring of a photo vest so that its always available this pouch is made in the usa protects most lenses against dust moisture impact cylindrical design for better fit wide mouth opening for easy access drawstring closure belt loop