foot warmer(S)-white

foot warmer(S)-white
Foot warmer has many names, such as, insole Warmers,Foot Warmers,Feet Warmers,Heated Socks
What’s foot warmer(S)-white?
The details are as follows:
Specifications:
Size: 250x75mm or 230x70mm
Weight : 72g
Pack: 180pairs/carton
Heating Last: 6hours,
Average Temp: 38C
Max Temp: 45C

Material: Iron Powder, Water, Vermiculite, Activated Carbon and Salt.etc

Shelf Life: 3years
Storage: Keep in dry, cool place and avoid direct sunlight
Its features: All natural ingredients
Air Activated
No batteries, no microwaves, no fuels