I've been looking for this everywhere and was surprised to find it on the Amazon. I've seen another version of this without the padded neck piece and this one is definitely a lot more comfortable. It alleviates a lot of the pressure and pain I get in my lower back after we've been going at it for a few hours . It feels like your upper body balances out with your legs when they're suspended in the air and all you have to do is adjust the straps according to your comfort level. Some stores charge anywhere from 50-100 for something similar and its not worth it. Buy this knee trust me .... Your body will feel better and you will be able to enjoy what you're doing.