Overview: This pillow is the "you must have accessory for your iPhone 4" Make you more outstanding no matter where you are Perfect for use in cars, office, home Make you feel very comfortable, soft & high mobility Specifications:- The filler of the nanometer toy is 0.5-1mm nanoparticle (EPS Styrofoam Particles)- The cover made from high elastic spandex fabric (82% Nylon & 18% Spandex)