I see in us a boxing rumhandtieren with eneim homemade reballdo and was flashed try after a short that I barely see the marble and wanted to train me to the effect better so I bought myself the reflex ball from reballdo to try. it's definitely an interesting loosening of training and upgrading and also in a shorter time. But is the price in my opinion far from justified. after all ists only a Velcro Headband with ner cord Vorndran on which hangs the ball. the ball is soft from a kind of foam, no tennis ball or something. the eye is so nich equal to blue if it's asleep :) times while practicing the band has got the ball scchon something attacked because of this small pinokel to protect against abrasion of the ball at the attachment site of the band until I verutschte node NEN made about it. as I said, you can train with great, but really expensive for some product.