Those numb tingly feet benefit from what I call a rice bag which you heat in a micriwave. You can make one by filling a heavy large cotton athletic sock with rice, or use what I do and buy a "body shawl". I love it for cold feet and shoulders heat therapy. There are lots of places to buy one online. I get mine at https://www.grampasgarden.com/customer-favorites/small-body-shawl/