1. Material: cationic cloth 2. Function: breathable, wear-resistant, shock-resistant, waterproof 3. Multi-layer large-capacity, multiple use methods, easy to carry 4. The bag adopts high-quality hardware accessories, bright color, durable, not easy to rust 5. Made of high-quality fabric, wear-resistant and scratch-resistant 6. Water repellent material, safer to use 7. External dimensions: 13": 37 x 27 x 5 cm, 14": 40 x 30 x 6 cm, 15": 44 x 33 x 7 cm, 17": 46 x 36 x 8 cm 8. Internal dimensions: 13 inches: 33 x 23 x 4 cm, 14 inches: 36 x 26 x 5 cm, 15 inches: 40 x 30 x 6 cm, 17 inches: 43 x 33 x 7 cm 9. Weight: 13 inches: 580 grams, 14 inches: 620 grams, 15 inches: 730 grams, 17 inches: 980 grams