The only off-ice training tool that truly offers an ice-like skate feel and used by players of all levels, including 300+ NHL players. Marsblade O1 chassis complete with our Kraft Team boot. The O1 off-ice roller skates are powered by the patented Flow Motion Technology, a unique rocker that simulates ice skating, challenge players balance and activate the right muscles to improve on-ice performance. About the Technology The patented Flow Motion Technology is based on a split chassis design with a rounded upper part rocking against a flat lower part. This creates a unique rocking motion that replicates the radius shaped ice blade and enables an ice-like skate feel. The Rocker is also designed to challenge players balance and activate the core and stabilizer muscles to maximize your off-ice training with a completely different skating feel and training effectiveness compared to regular rigid inline skates. Kraft Team Skate A high-quality hockey boot that offers great fit, support and performance for recreational and aspiring elite players serious at improving their on-ice skills. Constructed with injection molded composite PVC and heat moldable for a nice custom fit. Comes in skate sizes 6-11.5 and standard D-width.