NIKE Men's Lunar Edge 15 Running Shoe Black/White mesh Notched partial inner sleeve made of lightweight mesh for a sock-like fit that hugs the foot Flywire technology provides zonal support and lightweight lockdown for explosive movements Mesh and strategically placed no-sew overlays form a lightweight exoskeleton for breathability and a lightweight fit Ultra-soft collar lining package provides a snug, comfortable fit Lunarlon cushioning system for impact protection and support