Use one of 6 US-Mattress coupons including coupon codes and product sales for January 2019. Today's best coupon is a $25 Off promo code. Don't cheat yourself out of a great night's sleep when you can find the ultimate in comfort from US-Mattress. They feature all sizes of mattresses from trusted brands like Sealy and Serta, as well as bedding and linens to complete the package.