1.high quality,most competive price 2.pretty design 3.size:40g,55g,60g 4.materical:pvc,CH3COOH 1) Instant heat up to approximate 54 Celsius when activated 2) Can be reused more than a hundred times by following the instruction3) Can be used outdoor for physiotherapy4) Especially effective on muscle aching, back aching, cramps arthritis pain andtenontodynia5) To recharge: place the hot pack in ...