The SWB 20 heated underblanket ensures better falling asleep and staying asleep on cold days. With a standard size of 150 x 80 cm and secured to the mattress, it lies flat in the bed and cannot slip. Both the top and bottom sides of the underblanket are made of fleece material, which can be washed in the washing machine at 30°. The temperature of the 60 W heated underblanket can be adjusted in three levels, with illuminated settings for better visibility.