Amazon has the 6-Ct Band-Aid Brand Hydro Seal Adhesive Heel Blister Waterproof Blister Pad and Hydrocolloid Gel Bandages for $2.99. Add two to cart to reach $5.98 - 5% off with Subscribe & Save (can cancel anytime) - $1.50 off at checkout (BOGO 50% off) = $4.18 with free shipping on $35+ or with Prime.