Overstock again drops the Slumber Solutions Highloft Supreme 3-inch Memory Foam Topper to $57.99. With free shipping, that's $1 less than the lowest price we've seen to date. Available in five sizes for this same price, this hypoallergenic, antimicrobial, dust mite resistant topper provides pressure point relief and features a textured design for improved air flow. It is well reviewed with 4.5 out of 5 stars from over 440 buyers. There's no sales tax (except UT).