The cornerstone of the K2 Binding lineup, the K2 Formula Bindings are clean traditional two-strap bindings stacked with a time and team proven technical feature set. Offering canted footbeds, Pro-Fusion GF chassis lightness and Rocklock highback coring; the Formula Bindings are beyond solid and dependable. Size M fits men's 5 - 8 or ladies 6.5 - 9.5 or Mondo 23 - 26 cm.