ABEC bearing with less vibration, longer wear and a better roll,90A hardness wheels have more spokes for greater support and stability. Two micro-adjustable buckle and lace closure system easy to use, help fasten the feet properly into the skate enable a secure fit. Use EVA elastic cotton, also have a stretch band,flexible to adapt to different foot types,make the feet and shoes fit perfectly,breathable?comfortable,washable. Provide the fitness enthusiast and racer superior protection, Whether it is a simple outdoor recreation skating or a competitive racing. Recreational fitness inline roller skates Light weight hybrid Series aluminum 3 wheel frame with quick change axles Bevo race rated-7 speed bearings Extra supportive molded shell featuring dual buckle secure fit system and comfort weave liner