The Sidi Soft Instep 3 is a genuine Sidi spare.

Sidi Soft Instep Closure System for Wire Techno 3: Sidi's Soft Instep Closure System is an anatomically shaped pad-and-strap combination that more evenly spreads loads across your foot. Over time and with much use you may want to replace these straps to attain the original secure fit, especially if the ridges wear and the buckles don't hold as well.