Seems to work great so far. Neck heat is really good

It's not the length of king size.

I use this product for the first time last night absolutely perfect the way it wraps around your shoulders neck and waist line with a tie strap is really cool. Plus the magnetic tips for the pieces that go around your neck are the perfect added feature needed to make this the bestHeating element you could use for your neck, shoulders and back. Also it’s fantastic because you could take it off and put it around the front of your entire body multiple uses cannot say enough, how pleased I am with this product.