Many companies do provide extra accessories available for purchase that will enhance the product of the original purchase. Straps are sometimes provided with the purchase of a bag, sack, case or pouch, but can often be purchased additionally. Bungees, carabiners, and D-rings are always a good option to have on hand for securing bags and cases to the deck or inside of small watercraft. These can be purchased at most marine or outdoor outfitter locations.