Zipper has had no issues and the charging cable stays securely inside. Second, while the dryer appears to be well designed and built, the plastic used appears to be polystyrene, which I expect to become brittle, leading to cracking and breakage from the use of heat over time. Pack and all Id be pushing close to 300 lbs on them. Not truly secure. pristine condition . It blocks out noise well enough that you sometimes cant hear yourself speak, so I have cranked my mic monitoring all the way up. Ill go back to my good ones from lowes 5 and he sized up to 12 without any issue. Going for the second one now but its out of stock! used Amazon foot sizing tables.