Low quality - Exped SIM UL Duo Sleeping Pad

I got this sleeping pad mainly for car camp. After couple car camping trip, the mat bulged a little bit at one corner. I didn’t think it was a issue until one night while asleep on the mat, a loud pop sound waked me up and realized it was the bulging expading in size. Now I have to deal with a giant bulge. This is an obvious defect. I love how comfortable this mat is relatively to it’s thickness but definitely not happy with the quality.