100% Polyester HIGH-QUALITY AND WATERPROOF POLYESTER FABRIC - Polyester fabric and powerful craftsmanship make the sling chest bag durable and not easily deformed. You can be used the crossbody shoulder pack with waterproof material anytime and anywhere, protect the contents of the bag on rainy days. STREAMLINED AND COMPACT DESIGN WITH MULTI-FUNCTIONAL STORAGE AREA - 13.7 x 8.6 x 2.0 inches in size, 0.7 lb in weight. Very lightweight, convenient to bring with. 1 main zipper pocket with compartment fits for an iPad mini (7.9 inches), umbrella, camera, wallet, notebooks, bottle. The zipper pocket with magnetic flip can store a watch, power bank, keys, paper towels. The back safety pocket can store valuables such as phones, passports, and ID cards. ADJUSTABLE REMOVABLE STRAP WITH BREATHABLE MATERIAL AND REFLECTIVE BELT - Adjustable shoulder strap from 48 to 62 inches, fit your body comfortably. The messenger bag can be removed by detaching the shoulder strap; without having to go around the top of your head when you wear glasses or a hat. The reflective belt on the shoulder strap improves safety and can also be used to fix the earphones. You can also hang glasses. The breathable material makes you more comfortable to wear. HUMANIZED DETAIL DESIGN - Magnetic flip design and aesthetic construction, to create a golden ratio and three-dimensional modeling. Headphone jack design and smooth movable zipper bring a good experience. Reasonable storage with multiple pockets is not the trouble of losing items in the pants or coat pockets. USE YOUR MULTI-FUNCTIONAL BAG ANYTIME - Can be used as suitable for office, school, outdoor, business, and other occasions; can be your casual backpack, messenger bag, shoulder bag, crossbody backpack, casual daypack, sling bag, chest bag, working or business bag..Items from Sheng Xinshun's shop