This simple easy to use shoulder strap pocket, while designed with Gossamer&';s hiking packs in mind, will fit on most any pack. With a wide opening zipper and a wee bit of foam to help it hold it shape make it very easy to access your goods. The plush soft interior liner is protective . This pocket attaches securely and easily with one vertical strap and two horizontal wrapping wings. A front mesh stretch pocket makes it the perfect extra storage pocket.