Insoles Spenco Walk/Run M10-11 W11-12 For walking running or jogging * Special heel strike cushioning delivers optimum shock absorption for repetitive rear foot impact * Proven to deliver the best combination of shock absorption and energy return during any athletic activity * Rubatex Neoprene is laminated over a specially contoured lightweight polyurethane base to provide outstanding cushioning and foot stability Shipping Carton Size: 18 L x 9 W x 5 H