DetailsHot-Pak® is the original herbal heat pack, designed and developed by Intelex in 1996. Simply heat in a microwave for two minutes to provide hours of soothing warmth and comfort. Made from sturdy corduroy. Provides soothing relief from common ailments such as rheumatism, arthritis, migraine, menstrual pain, stress and tension. Over 1,000,000 satisfied users! 30cm x 15cm Fragranced with dried lavender flowers to aid relaxation Microwave for two minutes ( for an 800w microwave) maximum. Stays warm for several hours Available colours : Magenta, Purple and Green Can also be frozen 100% Made in Australia Safety Information All of our products have been designed and developed in England utilising over 10 years experience in manufacturing microwavable heat packs. All products conform to either EN71-1/2/3, ASTMF963, CE or MDA standards of safety. Please do however excercise caution and heat only for the recommended time. Do not use in a covered bed as a substitute for a hot water bottle.