4D Pro® Bungee Trainer System 4.0
In addition to significantly higher-quality carabiners, we have created more robust handles, which are better by a new casting technique in the hand. In addition, the alignment of the seat carabiners in 4.0 now guarantee a more comfortable bungee experience. But most of all, the quality of the elastic lambda bands was very important to us, which we were able to noticeably increase after much research and measurement w...