BOOTS = Hydro LT Inline - Fully Hinged Cuffs - Ankle Support System - Molded Boot - Polyester & Polyethylene Foam Lining - Quick Lock System * Frames = Hydro LT Inline - 4 x 64 mm Frame * WHEELS = California Advanced - 64mm Inline Wheels * BEARINGS = Excelerator - Precision Speed Bearings * Sizing: These Skates are in Men"s Sizes. Ladies Go Down One Size.