Hockey Roller Skates Skate head: PP head, cold resistant(-25âÂÂ), impact resistant. Skate tongue: 8mm encrypted felt embroidery + PE film(thick but with good air permeability) Quarter/Shaft: Double layers fabric + PE board (hard, powerful, impact resistant) Skate lining: 6mm polymeric foam cotton + mirofiber lining Surface fabric: PVC + mesh cloth (cold resistant -25âÂÂ) Skate insole: cold press sole with additional thickness, air permeability and good shockproof effect. Base: integral aluminum bracket Roller: elastic transparent PU rollers. Bearing: ABEC-7 Chrome steel Size: 27-46 Features: the skates are with hard shell and soft inside structure. This structure will well protect the feet. These skates are suitable for long time skating.