Spenco Walker/Runner Insole - Cradles your feet with targeted cushioning that improves your athletic performance and prolongs the life of your shoes. Ideal for walking, running, training and sports. Air injected Spenco material 4-Way stretch Antimicrobial Size 3: Women's 9-10/Men's 8-9 Size 4: Women's 11-12/Men's 10-11 Size 5: Men's 12-13 Size 6: Men's 14-15