Three layers of frame support, will not deform: The outer layer is fully waterproof 600D polyester TPU, wear-resistant, scratch-resistant. The middle layer is new 1MM PE reinforced board, which will not deform. The inner layer is waterproof lining to enhance fastness.
Five straps to ensure stable fixation on the bike. The width of the top fixing strap is 1.37inch, which is widened for more stability. Removable straps can be adjusted to fit the triangle area of the bike.
4L Large Capacity: You can easily pack your water bottle, pump, cell phone, gloves, sunglasses, etc. with just one bag, which is needed for medium to long distance riding.
Waterproof zipper and zipper cap can prevent rain
Size: 15.5*9*2.5inch. width is only 2.5inch, so you won't hit your thighs when riding. Weight: 0.77lbs. We recommend measuring the size of the bike triangle before purchase.