Blackburn central seat bagthis water resistant blackburn central seat bag is small enough to stay out of the way but has room to spare with its generous 05 litre capacity the interior compartment is spacious enough to hold the essentials and a mesh pocket for smaller items the rubber o ring post attachment ensures you wont scratch seat posts or carbon seat masts and the reflective piping and rear tail light loop helps you stay visible in low light featuresno hook and loop material to snag