Most boosters that we have owned that use the latch would loosen over time which caused us to have to retighten the seat constantly. (albeebaby.com)
The the durability and build of the sleepsack is good as there are not signs of threads or seams being loosen over time of usage of and washing. (bestswaddleblanket.com)
As tartar grows, it literally pushes the gums away from the teeth which then loosen over time. (dogbreedz.com)