Product Description:Heaven Disposable Instant Hot Compress Pack is a bag that consists of two bags: one is water,the other bag is magnesium sulphate. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. This reaction will release heat, quickly increase the pack's temperature. Instant hot packs are used for smoothing sore muscles, muscle spasms, and joints stiffiness.Product Specifications:Material: magnesium sulphate,waterPouch Material: PESize:5"x6", 6"x9" etcWeight: 105g,260g etcColors: White or Transparent etc. Product Features:Single use only disposable design provides a convenient and effective means of instantly treating sore muscles, muscle spasms, and joints stiffiness.Longer bag size is ideal for wrappingMinimal risk of cross infectionPacking Informations:Item No.SpecificationInner PackingOuter PackingCarton Size (CM)HA3013015"x6".105g1pc/bag100pcs/ctn55x22x21HA3013026"x9",260g1pc/bag48pcs/ctn38x24.5x28Other Photos: