The Original K2 Softboot - In 1994 K2 introduced the world's first SoftBoot inline skate - which was to change the world of inline skates forever. The K2 Original SoftBoot technology has often been copied but never reached. To this day, the K2 Original SoftBoot technology is still leading the market and has been developed again and again to offer the highest level of comfort. Whether for women, men and children for all purposes from family fun to daily fitness and professional competitions, the soft boot design is still the measure of all things in inline skating. Stability Plus Cuff - The Stability Plus Cuff is the perfect blend of support, flexibility and comfort in K2 inline skates for every skater. – F.B.I. Rail (Frame Base Interlocking) for an extra damping of the vibrations ABEC-5 Bearings – Wheels: 80mm 80A *maximum wheelsize 80mm Traditional lacing with Velcro Brake mounted (can be changed on left shoe)