Groupon offers the Beautyrest ComforPedic 3" Loft Twin Memory-Foam Mattress Topper for $69.99 with free shipping. That's tied with our mention from two weeks ago the lowest price we could find today by $11. It features 3" of open-cell memory foam, which is hypoallergenic and antimicrobial.

Note: Although the full-size topper is pictured, this deal is for a twin-size topper.