Our nap Wrap with built-in massager soothes your neck, shoulders, legs--even waist--with ultra-plush NapSoft material and soothing vibration. Simply wrap the massager around you and adjust the ends for instant relaxation. Uses two AA batteries (not included?.The minute your skin comes in contact with Brookstone NapSoft material, you begin to feel its therapeutic effects. The plush material instantly envelops you in soothing softness and cradles you in comfort. The result is a warm, relaxing sensation that seems to permeate through your entire body.