" Fit & Design: MOLDED BOOT - Technology without extra expense in this versatile and durable skate LI> SUPPORTIVE & VENTED - Lateral support, vented for breathability Technology: EXTRUDED ALUMINUM FRAME - Rigid, stable 243mm/9.6" frame lowers the center of gravity for increased speed and maneuverability Additional Details: ROLLERBLADE URBAN PROFILE WHEELS - 80mm/80A wheels and SG7 bearings add stability, reducing wear while maximizing grip and speed "