The Ortlieb Seat Pack 11 Litre in Slate is perfect if you require a lot of on-bike stowage space but have a smaller frame or full-suspension mountain bike dropper seat post.
It features a roll closure & compression straps to ensure stability even across bumpy terrain, and thanks to an air-release compression valve, you can reduce your loaded Seat-Pack to an extremely compact size. With its IP 64 waterproof rating the Ortlieb seat back also doubles as a rear mudguard!
Ideal for hybrid bikes, mountain bikes, road bikes or electric mountain bikes
Can be mounted to carbon seat posts
Fits round seatposts with a maximum diameter of 31.8 mm
LED light loops positioned for various rolled-up states of bag closure
IP 64 waterproof rating doubles as a rear mudguard