... ,EN71,FDA,SGS,USP61,approved 2.OEM available 4.Non-caustic/Non-toxic/Safe Hot Pad1.CE,MSDS,EN71,FDA,SGS,USP61 ... life 3.OEM service 4.high qualiy-price ratio2.non-toxic,reusable,instant,portable 3.heat anywhere,anytime 4.Certificate: ... the crystals dissolve.Without electrics, the magic handwarmers are recycled and environmentally friendly products.It could be used outdoors.Please advice if interest! ...