The cover is washable, so it is hygienic.
Can be used for a variety of purposes, as a seat cushion, or as a foot heater.

Specifications:
Cord Length: Approx. 5.9 ft (1.8 m); Power Consumption: 30 W; Cover Material: 100% polyester; Body Outer Material: 100% polyester; Heater Size: Approx. 17.3 x 17.3 inches (44 x 44 cm); Cover Size: Approx. 19.9 inches (48 x 48 cm); Product Weight: Approx. 1.3 lbs (0 kg).

From the Manufacturer

Hot Mat KDM-4593

Easy to use throw blanket

The cover is washable, so you can use it as a hygienic zabuton, and you can use it for a variety of purposes.

Specifications:

Cord Length:	Approximately 5.9 ft (1.8 m)
Power Consumption	30W
Temperature Control	Electronic control
Safety Device	Short-circuit detection circuit, prevents overheating
Central Surface Temperature	Approx. 104°F (42°C).
Cover Material	100% Polyester
Main Body Material	100% Polyester
Product Size (W x D x H)	Heater Size: W 17.3 x D 17.3 inches (44 x 44 cm); Cover Size: Approx. 18.9 x 18.9 inches (48 x 4
Product Weight:	Approx. 1.3 lbs (0.6 kg).