The POC Ultra Saddle Bag 7L is a roll-top seat pack for overnight and multi-day riding. It suits bikepackers who want serious volume behind the saddle without a rack. The translucent TPU outer is reinforced with an internal frame that holds the bag's shape, which is what stops a big seat pack swaying under load. Welded seams make it fully waterproof, and the shaping keeps it narrow enough to stay clear of your thighs while pedalling. A 3-point fastening secures it to both the saddle rails and the seatpost, and the roll-top closure means you can cinch it right down when carrying less. Key features 7L capacity with roll-top adjustable volume Fully waterproof TPU with welded seams Internal frame to hold shape and reduce sway 3-point attachment to saddle rails and seatpost Shaped to minimise leg interference Reflective details on each side Check seatpost clearance and tyre gap when loaded.