- The Sling Bag is made of high-quality materials, and the slingbag is reinforced and double-stitched at all stress points. Sturdy and durable, our special coating makes our training backpacks both waterproof and scratch-resistant. - This slingbag holds all your essential gear. The extra-large multi-layered interior storage compartment can accommodate a large amount of outdoor gear and meet your daily travel needs. Suitable for outdoor activities such as fitness, outdoor travel, hiking, etc. - Material: 600D Oxford Polyester - Capacity Around 40L - Size: 13.78 x 9.84 x 5.51 Inches