Wheat bags have been used in alternative therapy for many years. Wheat has a unique cellular structure which can absorb heat or cold quickly and then release it evenly. It is believed to help conditions such as arthritis,menstrual pains, aching joints etc. And as for Lavender well its renowned for helping to relieve tension and pain so you can imagine how relaxing these are combined. An excellent and safe alternative to hot water bottles. Heat in the microwave. Different designs available.