Material: PVC (passed 6P test) Worried about the weather during your trip? Don't worry if the bag falls into the water. High frequency seamless welding technology and waterproof material, just rinse with water and wipe a towel is available when cleaning. STURDY BANDS, WEAR RESISTANT AND NON-SLIP: Multi-band design, non-slip leather at all positions of the contact seat, effectively increase resistance and reduce slippage. Add a strong tape, hold it firmer when loading heavy items. With plastic buckle, stronger, more effective lifting, increased capacity. Reflective brand logo and multi-position tail light design, reflective printing of inner tail light hanging hole. Safer in the evening. Helmets, bicycle pumps, clothes, etc. can be hung on the outside of the bag. Suitable for medium and long distance cycling outdoors.