When the Urban Worm Bag has been operated with too much moisture, it can calcify or corrode the zipper. This problem is made even worse when the Bag is kept outdoors and is subject to direct precipitation and sunlight which voids the warranty.
In 2021, we launched a newly-redesigned bottom with a patent-pending buckle and Velcro system that is fully removable. Please e-mail us at support@urbanwormcompany.com to see if you qualify for a free replacement.