Hot & Cold Foot Wraps. These Hot/Cold Foot Wraps are ergonomically designed to fit the contours of your feet to deliver gentle heat therapy deep into your muscles. Simply pop the wraps in the microwave to heat them, or leave them in a bag in the freezer to chill them down. They’re perfect for arthritis, bursitis and general heel and arch pain or tiredness. And buy this Hot & Cold Foot Wraps Now £12.99.