1. Material: waterproof oxford cloth, 5mm pearl cotton 2. Scope of application: 38/40/41 inch guitar, 21/23 inch ukulele 3. Enlarged capacity front pocket design, can hold music score textbooks, etc. 4. No fear of rainy weather, easy to travel and carry 5. Thicker straps, comfortable and labor-saving, adjustable length 6. The side handle design is convenient for short-distance mobile use 7. Two-way zipper, durable 8. Weight: 700g guitar bag; 400g ukulele bag 9. Size: 40/41 inch 42x13.5x105 cm; 38 inch 38x11x99 cm; 21 inch 23x8x57.7 cm, 23 inch 25x8x59 cm 10. Note: Only backpack, not guitar/ukulele