What do HV and HL of roller skates mean?

HV, Migao is a mid-range shoe type, full name: SEBA-HV. This kind of shoes has very strong comprehensive performance, which can be leveled and braked. It is a kind of shoe suitable for all the fans who play freestyle roller skating. Another version of HV HL is the European version. The lining of this shoe is removed, and the upper is changed from leather to cotton net, which is more breathable and elastic. Therefore, this shoe is more inclined to flat shoes.