Using this Kold Koller from Dura*Kold, makes your entire body kool during the warmest weather. Easy and comfortable to wear. Includes 1 insert (which stays cool up to 2 hours without refreezing). Economical! Durable! Reusable! Safe - temperature will not burn or cause frostbite or skin burn. All ingredients are non-toxic; however, they are not intended for ingestion. Warning & Contraindications: For use with Pro-Kold Wrap. Do not apply inserts directly to the skin. Extreme care must be taken when using any cryotherapy product. Cryotherapy should not be used by persons with Raynaud's disease or any other vasopastic disease or compromised circulation.