Material: High quality thick nylon fabric (waterproof, environmentally friendly, no smell, light weight, durable), lining is wear-resistant polyester, high quality smooth zipper.Your Comfort: The casual is lightweight and carries a breathable and adjustable wide shoulder strap, and more comfortable carrying will reduce the strain on your shoulders. You can put it in your luggage when you travel. The sleek zipper design makes it more convenient and easier to access your items.Thoughtful Design: The handle and strap of the backpack are reinforced with stitching to support heavy loads. The back of the backpack is equipped with a protective pad to better protect the contents of the bag. The straps are made of thick pads and breathable mesh that provide a breathable and comfortable feel even when used for long periods of time or carrying heavy loads.Multi-purpose: Multi-purpose backpacks are unisex and suitable for a variety of activities such as gym, yoga, swimming, training, sports, beach, jogging, hiking, camping, picnics, Tours, day trips, overnight accommodation bag backpacks, etc.Versatile: Our versatile backpacks come with multiple straps. It can be carried on both shoulders, and the adjustable shoulder strap ensures that the backpack is where you want it to be, (ps: The shoulder strap is hidden). There is also a sling type shoulder strap (ps: removable, adjustable) to give you other carrying options. At the same time, the backpack also has a handle on the top, which is convenient for you to carry around as a handbag.size : ( length 25cm,width 13cm,height 20cm,weight 0.41kg)