ROCKBROS is an original brand founded by cycling enthusiasts. Our goal is to offer high - quality products at an affordable price to every customer who loves cycling and outdoor sports. With a bottle holder With a taillight holder Fixed with 3 Velcro fasteners ROCKBROS Waterproof Bicycle Saddle Bag with Bottle Holder and Taillight Holder Product Details: Brand: ROCKBROS Materials: Carbon fiber + 600D nylon (Black - Green) Polyester + PVC (Black) Weight: Approx. 215g (Black - Green) Approx. 228g (Black) Capacity: Approx. 1L Suitable for most bicycles such as mountain bikes, road bikes, and e - bikes. Compatible with water bottles with a diameter of less than 6CM Product Details: Taillight Holder Design The taillight holder and reflective element design enhance safety during night rides. Inner Pocket Design With side compartments and mesh pockets, tools can be stored separately. Double Zipper Design This saddle bag features a double - zipper design, making it easy to open and close. Note: Please leave a seat post of more than 20 cm to prevent the bicycle saddle bag from rubbing against the rear wheel. Brand: ROCKBROS ROCKBROS Model: C7 - 1 C35 Color: Black - Green Black Materials: Carbon fiber + 600D nylon Polyester + PVC + sponge Weight: Approx. 215g Approx. 228g Capacity: Approx. 1L Approx. 1L Feature: Waterproof Water - repellent