With orders of $25 or more, Amazon offers Prime members the Envision Home 16" x 24" Microfiber Bath Mat
in Espresso, model no. 409100, for $5.60
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping.) That's the lowest total price we could find by $11. It features a memory foam interior and hanging loop for drying.
Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.