NICGID Sling Backpacks, Sling Chest Bags Shoulder Pack Crossbody Bags for Men Women Outdoor Travel (Black)Material: Durable and lightweight outdoor sling bag. It's the perfect size and appears to have a very solid construction. The size of it is not as big as a backpack. Practical: If you want something smaller to carry rather than having to lug around a huge backpack, this sling bag is a good alternative. It can carry wallet, cell phone, keys, charger, water bottle. Breathable Shoulder Strap: You can adjust it easily for your ideal length and reinforced