Easy on/off silcone straps instead of velcro resist weather and wear. Double zipper design interior key hook and id pocket. Silicone inlays to prevent seatpost scratching. Silicone straps do not stretch or loosen over time and wont harm Lycra. Mounts/unmounts in under 10 seconds. Soft bag with a hard exoskeleton frame. Reflective light mount loop

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