SAHOO Waterproof Seat Bags offer durable storage for cyclists featuring taped seams, roll-up closures, and tough, waterproof TPU construction. Designed to perform in the harshest conditions, these bags are perfect for everyday use or extreme bikepacking adventures. Features: Material TPU composite cloth and HYPLON make this bag fully waterproof and easy to clean. The air valve button allows you to charge and deflate freely, keeping your bag in shape at all times. Fixed Securely - Using a super wide Velcro Strap, attach to the seat post and two strong solid Snap-on Buckles under the saddle. Compatible with almost all kinds of bike saddle and seat post. Safety First - Reflective elements on this saddle bag increase your night visibility during night cycling. Taillight hanger ready for taillights. This saddle bag has a 7L capacity and weighs only 433 grams.