Serta Foot Warmer. Enjoy soft and comfortable feet any time of day. Our Serta Foot Warmer is made of 100% polyester angel fleece and feature a removable controller with four heat settings. You can use the Serta Foot Warmer at home or take it with you anywhere. It will sure to keep your feet warm and cozy no matter how cold the weather gets! Dimensions: 32" L x 20" W x 1" H Weight: 3 lbs.