I've had this out for several hundred miles now, some of that in cold, wet conditions. It has held up fine so far. It is big enough to hold a spare tube, levers, co2 and patch kit with no problem. I think I could get another cartridge in there if needed. Looks good and stays put! Just what I needed! (I replaced another, higher end bag that did not attach to the seat post since It was always coming loose.)
I planned to ride a century but didn't want to depend on rest stop food offerings (certain foods just don't settle after mile 50). I stuffed my jersey pockets but looked like a deflated Michelin Man. So I ignored Rule 31 and purchased this European Man Satchel. It's big, swallowed everything I dared dump in it, but cinches up nicely and is barely visible under my Selle Italia Flite.
Of course any seat bag is an abomination. But this one is a useful abomination. And my Jersey mainted it's sleek, aero, Ero-pro look (or at least what was possible given the body it was draped over). What more could you want?
On first opening the box, my reaction was this bag is too small to even hold a tube- just ship it back. But with a little patience I worked in a tube, tire irons, a CO2 cartridge and an allen wrench set in the size small bag. So the bag is big enough for what you need to change a flat or make minor repairs on the road, anything else put in the jersey pockets- that's what they are there for.
perfect size if you get the medium. fits a spare tube, tire levers, co2 applicator/canister, emergency spoke kit, tire boot, patch kit, multi-tool AND a pocket knife. you'll be the most prepared cat on the road-plus it looks great at night.
I needed a new seatbag that could hold roadbiking essential and this works great. It holds a spare tube, a patch kit, an inflator, a few CO2 cartridges and a compact too. Plus it's reflective and has a loop on it to hold a blinking rear light for dusk rides.