Keep your feet in fighting form with support and cushioned protection of the Spenco PolySorb Cross Trainer Insole. ; Please note: These are Spenco Insoles distributed by Implus. ; Sold as a one-pair pack. ; The Silpure Antimicrobial top cloth reduces friction and heat build up with it's four-way stretch nylon construction, preventing blisters and calluses. ; SpenCore heel-to-toe cushioning for full coverage protection. ; SBR rubber cushions the forefoot and provides extra protection against shock abrasion. ; Spencore heel-strike pad provides focused cushioned protection. ; Lightweight, contoured POLYSORB polyurethane foam bonds to closed-cell nitrogen-injected Spenco material, cradling the heel and support of the arch. ; Ideal for running, walking, and training. ; Imported.