HAOMUK Tactical Sling Bag Pack is made of high-density nylon fabric. Waterproof nylon cloth can protect your items against water and rain ruining when doing outdoor activities. Mesh sponge design on the back, breathable, comfortable, and has nice shock absorption. An adjustable and padded shoulder strap helps to keep the strap on your shoulder reducing slides. The bag can be enough placed and organized your cellphone, chargers, notebook, flashlight, water bottles, gloves, clothes, keys, wallet, survival tools, etc. The tactical sling backpack has an adjustable and comfortable single shoulder strap molle design. The vent design on the bottom helps the items heat-dissipating fast in the bag. A waterproof version of the flag patch is available for purchase.