The Mini is the only seat pack a summer roadie will need.The Castelli Undersaddle Mini is just the perfect bag that any road rider has a use for. Super compact this fit and forget under saddle, seat-pack can be crammed with a couple of (road) inner tubes a multi-tool, a spare link and a few £10s. Everything you could possibly require on a ride.The strap uses a magic moulded hook and loop fastener that can be trimmed at home and that won't fur your shorts.The Mini bag is also weather resistant as is the zip. (OK it's not totally waterproof but its better than most) the zip pull sits in a little cave so it stays silent and doesn't open mid-ride. The rear wordmark is reflective and the lining is in a pimp corporate red. Could you ask for more?Possibly the greatest accolade for the Castelli Undersaddle Mini is you forget its there.Key Features:Just the right size for a summer road bikes needs..Water and stain resistant materials.Water-resistant zipper.Water resistant construction.Adjustable hook and loop attachment strap.Internal storage pocket.Reflective accents.External dimensions 5 x 5 x 13cm .