Zipper busted after 1 ride

Familiarity:

I've used it once or twice and have initial impressions

Fit:

True to size

The bag seemed decent. It could easily hold a 29er tube, CO2, and tire lever. However first ride in the zipper burst open. It's a rubber, waterproof zipper, so I can manually force it closed with my fingers. However it just bursts right back open. I cant seem to fix the zipper. Save your money and pick a different saddle bag.

Kory G.