Discover the FIR Sauna Blanket-Zipper Design’s comfort and ease. Far Infrared Rays (FIR) technology is used in this cutting-edge sauna blanket to produce deep, penetrating heat that improves circulation, encourages relaxation, and aids in cleansing. The lightweight, portable form makes it ideal for vacation or home use, and the zipper construction makes it simple to put on and take off. Anywhere, at any time, the BW-801 provides a spa-like sensation.