Manufactured using tough polypropylene materials. Cools more efficiently than conventional ice packs. Fitted with a heat sealed leak proof cap. Filled with a non-toxic aqueous liquid. Manufacturer�s warranty included. Technical specifications: Meets and exceeds EN12546-3: 2000 specifications. Non-toxic liquid includes 99.5% water and E4666 preservative. Weight measures approximately 800-grams. Dimensions measure approximately 23cm x 31.5cm x 2cm.