Review on 🥊 Optimized Everlast Speed Bag Bladder for Enhanced Performance by Dustin Keller

I bought and installed one in November 2012. Then I decided to buy a backup copy in December 2012 and keep it at home in a hot garage. Then last month the first blister burst a hole so I pulled the fuse out. I installed a backup and as soon as I blew it up a hole burst at the very top. I noticed that the top of this bubble looked a bit chewy when I first got it, but thought maybe it was just made that way. But no, it wasn't good, and a hole immediately formed in that area. Since several years have passed, it is clearly too late to return it. Lesson learned; If you buy a replacement bottle, test it before storing it.