Double coupon! Amazon has the 8-Count of Gillette Mach3 Men's Razor Blade Refills for $23 - $4 off coupon (choose "One-time purchase" then check "Apply Coupon") - 25% off coupon (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime)  = $12 with free shipping on $35+ or with Prime. Each razor blade refill is engineered to last for 15 comfortable shaves.