Lowe’s has a few options available in this category, including the Frost King 1/2-inch x 6-foot Foam Self-Sealing Tubular Pipe Insulation for 3/4-inch Pipe — highlighted as a bestseller ...

Place the stick on your back and anchor it against your head between your shoulder blades and on your tail bone. Keep a light bend in the knees and hold the stick in contact with your head, upper back ...