Superior Material Water-resistant --- The bicycle saddle bag is made of 600D Oxford material, which is super water-resistant and anti-scratch. The zipper is adopted of seam-sealed waterproof design, effectively prevent rainwater from entering the bag, protecting all of your belongings well and keep them dry and safe. Adjustable Installation Position Strap-on Install --- All of the bags body around with several loops allow to adjust the bag installed in the back or front by removing detachable fixing straps as you needs. Equipped with 3 adjustable fastener straps, 2 fixed on the top tube and 1 fixed on the erect tube. The triangle bag wont move around even if you are riding on rough roads, and is very easy to install by straps .The pouch fits for most mountain, road and commute bikes. Super Reflective Design Safer Night Riding --- Large reflective area on both sides of the slim triangle bag can reflect lights from any direction, which make the frame bag be found easily, keep your night ride safer. An ideal choice for cyclists who enjoy night riding or those need to use bike for commuting in dark. Large Capacity Organized Compartments --- The cycling bike tube bag size is 8.9*6.1*2.2 inch, with storage compartment on both sides. Left zipper slot perfect for cards and cash, and the right big compartment is easy to hold your daily essentials and cycling items such as mobile phone, power bank, gloves, sunglasses, flashlight, mini bike pump, bike repair tools and other accessories. And the 2 interior layered pockets and key hooker can help to store the belongings organized. Large Opening Dual Zipper --- The right side main compartment of this frame bag adopted large opening mouth design for easy access. The double zippers provide more convenience when fetch items and the non-slip zipper puller can easily be gripped even with winter thick gloves.