borsa sottosella topeak aero wedge pack 1Aerodynamic saddle bag to hold tubes, tools, and other repair items. Mounts with our innovative Quick Release Buckle system to fit all rail saddles. Four sizes available to exactly meet the cyclist's needs. Medium and large sizes expand to add 20 30% more volume Large openings swallow all your gear Features a light clip for added safety 3M reflective strip for increased nighttime visibility Bag attachment Nylon straps Buckle Material 1200 denier