single use hand warmers

size:13x9.5cm packing:1pcs/polybag, 200pcs/Carton, 13.5kgs/Carton It is disposable hand warmer which not be reused. inside it is some iron powder, salt, activated carbon, water etc. It will warm up over 5-10minutes later after opening the outer polybag. This kind of hot packs (hand warmer) can be put into your cloth pockets, gloves, shoes to warm fingers, hands or feet.(1)single use hand warmers is air activited, heat pack (2)heat duration:16-18hours (3)for sports,camping,skiing,hiking etc.