Relax, unwind and enjoy heat relief from stress and sore muscles. The heat pillow will ease joint and neck stiffness, back and stomach ache, cramps, arthritis, sinus pain, tension and stress. The pillow moulds to body shape and retains the heat for up to 45 mins. The Cable knit heat pillow has an inner bag filled with silicon beads. Silicon is a safe, odour free alternative to wheat fillings. Silicon beads inside. 100% cotton bag. ALL NATURAL. cover 100% acrylic.