Made from cherry stones a natural waste product, discarded from food production. They're hand sewn into a two layers of organic cotton. Simply heat in the microwave 40 seconds and pop them in your pockets or directly onto the area you want to warm and wait for slow release of warmth. A Cherry Stone Pack can help with period pain, general pain and stiffness by providing gentle warmth. Cherry Stones: 1. Natural product 2. Machine washable (unlike wheat packs) 100% organic cotton & UK cherry stones