I have four cats and have gone through dozens and dozens of "break-away" collars over the past few years. The trouble is that they are always susceptible to be swatted off in the process of occasional self-scratching around the neck. These elastic collars are the very best solution I've found. They are high quality elastic, with a reflective thread sewn in that reflects back a strong light from a flashlight or car headlight. The ONE drawback is that while the prong can be adjusted in micro-increments into the fabric of the collar, it is prone to unbuckling itself. I realized this pretty early on, and have devised a solution that I recommend to anyone using this collar. Get the thinnest zip-tie you can find, and thread it through the loose end of the collar, and then secure it around the the doubled layer beneath. Cut the zip-tie flush, making sure the 'nub' is on the outside, away from the cat's neck. I remove my cats' collars at night time, when they're in the house, and putting them on/off each day by stretching them over their heads is a pretty easy thing to do, so I never have to bother with the buckle. Best collars I have ever used!