The Mission Saddle Bag attaches to any Road, MTB, or Gravel bike seat and is compatible with all dropper posts. Constructed using waterproof Dimension Polyant VX fabric and Hypalon, the saddle bag is highly weather resistant and quick drying. The compact design is outfitted with a YKK Aquaguard zipper and four internal elastic pockets to keep your tools stable and organized. Product Details - Attaches to any Road, MTB, or Gravel seat - Compatible with all dropper posts - Can also securely attach to most bike frames - Weatherproof - YKK Aquaguard Zippers - Hypalon attachment straps - Four internal elastic pockets Specifications - Dimension Polyant X-Pac(R) Fabric - Dimensions: 5" x 3.5" x 1.5" - Weight: 70g Made in the USA