1.5L/2.5/4L Waterproof Bike Saddle Seat Bag Size:2.5L 【Adjustable size】Two sides can be

【Adjustable size】Two sides can be freely adjust

Hideable shoulder strap and helmet cover

Aluminum alloy

5L waterproof top tube bag - K30

Compatible Chest Pack: MCY2603

1.5L/2.5/4L Waterproof Bike Saddle Seat Bag Size:2.5L 【Adjustable size】Two sides can beMaterial: PVC. Are you worried about the wearther during your trip? With it, don't worry if the bag falls into the water. High frequency process seamless welding technology and waterproof material when clearing, just need to rinse with water and wipe a towel is available. Strong fixing strap, anti friction and anti skid: More banding design, add non skid leather to all positions of contact seat, effectively increases resistance and decreases slip. Add