BHHTBB Waterproof Bike Saddle Bags, Expandable from 1.5L to 2L capacity, with Reflective details. Perfect for Gravelbike MTB.

"Expandable Design: The bike saddle bag measures 10.2 x 2.9 x 4.3 inches and has a volume of 1.5 liters, which can be expanded to 12.2 x 2.9 x 4.3 inches and holds up to 2 liters. It is compact enough not to affect your performance, but offers enough space to securely store most mini bike pumps, maps, smartphones, tools, snacks, and other accessories. Night Visibility: Reflective strips and a reflective logo increase visibility in the dark and enhance your safety. To further improve night visibility, you can also attach a warning light to the back of the bag (Note: Warning light not included). Waterproof Material: Made of 900D Oxford fabric and PU material, the road bike saddle bag is waterproof and scratch-resistant. The waterproof zipper effectively protects your belongings from rain, mud, snow, and splashes. Simply rinse with water and wipe with a towel for cleaning. Ultralight and Wind Resistant: Weighing only 175 g, this bike saddle bag features an aerodynamic design that minimizes air resistance and makes riding comfortable and stress-free. Suitable for most bike types, including road bikes, mountain bikes, folding bikes, and water bikes. Easy Installation: Thanks to the extra strong Velcro straps, the saddle bag can be quickly and securely attached. It fits snugly to the saddle and seat post, staying stable during the ride without wobbling."