The sports sack is made of waterproof material and is closeable with drawing strings. It comes with an inner pocket with Velcro fastener, which is excellent for storing cell phones and/or documents. The K-9® Sport Sack has a reinforced bottom to increase its durability. The drawstrings are equipped with comfortable leather paddings at the shoulder parts so the sack can also be used as a backpack. The Julius-K9® Velcro label on the front of the sack is interchangeable with custom made labels as well.Dimensions: 35 x 45 cmCapacity: 11 liters