Amazon offers Prime members the Sunbeam Quilted Polyester Heated Twin Mattress Pad with EasySet Pro Controller
, model no. MSU3GTS-P000-12A00, for $34.99
with free shipping
. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $8.83.) That's $25 off list and the lowest total price we could find. It's machine-washable and features 10 heat settings and a 10-hour auto-off function.