About this item 100% Polyester. SIZE: 17.3" L X 13.4" W. It is a great sports gift for men, women, youth, children, boys and girls who can use it as a gym backpack or a school backpack. The best sling bag can carry a variety of items such as gym clothing & shoes, swim gear, sports towel, soccer ball, volleyball, laptop, daily supplies. It's perfect for multiple activities, gym, sport, including swimming, walking, day trips, sports practices, overnight stays, vacation, running, shopping, Streetball, beach, jogging, yoga, dance, travel, carry-on, luggage, camping, hiking, team work, scout, training, gym sports, school PE lesson and more! The cool drawstring backpack with zipper extra large pockets compartment which is big enough for a mobile phone, wallet, cups, small umbrella or other items. ENHANCED DURABILITY & COMFORT: cute gym sling sack is made of High Density custom Oxford, which is SUPER durable and withstands daily wear and tear. Draw string closure makes you store things quickly and take them in and out easily. Thick drawstrings prevent straps from digging into your shoulders and help reduce your shoulder burden. Lightweight and Waterproof - This canvas drawstring rope bag is lightweight and easy to carry. The fabric is waterproof and all the things inside are protected very well. MACHINE WASHABLE: Being washable is a must for any drawstring gym pack. gym sack are Machine Washable, Recommend Mild Detergent and Hang to Dry! Research & Development We have several options for developing new designs: 1) Customers provide their artworks and samples for making samples 2) Customers give us only their ideas, and we design and develop them. 3) We design and develop our new products according to our marketing experience for our customers' choice 4) Every season we develop new fabric and new colors for our customers. Sending us your product ideas today to contact us for more information on our abilities. Quality & QC procedure After the order is confirmed, we have a meeting with all the departments before production, investigate all the workmanship and technical details, make sure all the details are under control. 1)100% inspection for the cutting, main trim, production(making a pre-production sample before production)and the finished product. 2)Morning meetings by the factory director each day; 3)Q/A for the during and finished production; 4)Q/A for packing inspection; 5)Final inspection while packing up all the messenger bags. If there is no other problem at this stage, our QC will issue the inspection report and release for shipping 6) We strictly follow ISO AQL standards