Features: Bionik Series 4 molded composite quarter panel for lightweight support and structure Comfort Soft microfiber liner paired with a premium performance felt tongue for an optimal balance of comfort and performance H3 custom foam blends enhance fit, responsiveness, and overall comfort Pillow padding with brushed tricot comfort liner and H4 custom foam profile Frame Fuse split frame technology with 80/80/76/76 wheel configuration Kemistry(TM) Good 7 bearings for smooth, consistent roll Kemistry(TM) Supra wheels designed for adult performance skating