This sling fishing backpack is made by high quality TPU,the whole bag is high frequency welding,and the waterproof zipper on main compartment can keep your things inside totally dry even the whole bag drop in the water when the zipper is closed.And there is patch with band which can hold the fishing rod.You can also put some small things in the front pocket,which is not waterproof but water resistant.The shoulder strap is quite comfortable and there is another simple strap in the opposite side to make sure the sling strap will not drop from the shoulder.Contact us if you want sample for a try.