https://tools.woot.com/offers/frost-king-indoor-shrink-window-kit-42-62in-9pk-2 9-Pack 42" x 62" Frost King Window Insulation Shrink Kit on sale for $6.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.