The Rollpacker® aluminum hanger is adjustable and will easily adapt to small frames, it eliminates all side to side movement (Tail Wag). This seat bag has one large waterproof main compartment and a second super practical compartment also waterproof. You will also find an easy access pocket in between the rear pocket and main compartment. This open pocket is always accessible, great for smaller items that you need to keep close (small camera, phone, snacks, etc.)