polyester1. High-quality waterproof polyester fabric - polyester fabric and powerful technology make the chest bag durable and not easy to deform. You can use the messenger bag with waterproof material anytime and anywhere to protect the contents of the bag in rainy days.2. Streamlined and compact design, multi-function storage area - size 13.8 x 8.7 x 1.6 inches, weight 0.6 pounds. 1 main zip pocket with compartment for iPad mini (7.9 inches), camera and wallet. The front zip pocket can store watches, keys and paper towels. There is also a small zipper pocket and a simple pocket, which can store small items such as bank cards, passports, ID cards, as well as common items such as power packs. The rear safety pocket can store valuables such as mobile phones.3. Adjustable detachable shoulder strap, made of breathable material and reflective belt - adjustable shoulder strap from 48 to 67 inches, comfortable fit your body. The messenger bag can be removed by removing the shoulder strap When you wear glasses or hats, you don't have to go around your head. Reflective tape on the zipper improves safety. Breathable materials make you more comfortable to wear.4. Humanized detail design - geometric design and aesthetic structure, creating golden ratio and three-dimensional modeling. The headphone jack design and smooth movable zipper bring a good experience. The reasonable storage of multiple pockets will not cause the items in pants or coat pockets to be lost.5. Use your multi-function bag at any time - it can be used in offices, schools, outdoor, business and other occasions It can be your leisure bag, messenger bag, shoulder bag, messenger bag, leisure bag, sling bag, chest bag, work bag or business bag. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.