So Many Backpacks, Why DVEDA? The Difference is in Details. Durable To ensure the longevity, we thickened the shell and lining fabric, and the double-layer bottom piece provides extra strength and long-lasting performance with the lightest weight possible. We adopt the durable abrasion resistant YKK metal zipper which is better than most SBS zipper in the market and thicker flap to avoid any struggle with the zipper open / close every time. Don't worry that the zippers constantly get stuck in the flaps. Breathable Padded Mesh Straps Breathable mesh shoulder straps with plentiful sponge padding help relieve the stress from your shoulder. The S-shaped straps can distribute stress averagely. This talented design makes you feel comfortable on your trip. Lightweight & Compact No like any other bulky backpacks, this backpack is in a slim shape and only weighs 0.7lb, a true space saver. Folds into its inner zip pocket, it converts into a handy pouch. To avoid overweight charge, simply unfold from your checked bags and use it as a carry on for your excess baggage. Water Resistant Made with water resistant nylon to protect your things from rain, splashes or spills. When it rains outdoors and it’s too late for you to find a shelter, this backpack can keep things inside dry for a while. Chest strap with whistle buckle When hiking, if you get separated from your companions, you can whistle so that your companions can find you more quickly .