Our heated back wrap delivers soothing relief, fast Our calming lavender + herbs-scented back wrap provides instant, air-activated heat relaxation + soothing relief from tight back muscle + joint aches or pain associated with overexertion or menstrual cramps. Ingredients: Iron Powder, Salt, Activated Carbon, Vermiculite Includes: 1 single-use back heating patch One size fits most • 43.3" x 5.5" (110 x 14 cm)