Can these be used on bare skin or with nylon only as a barrier or do you need socks on?

Thank you for your enquiry. The Hothands Foot warmers should not be used on bare skin or over thin materials such as nylon. The warmers should be used over a pair of socks.

I have 4 unopened packs and 1 opened. They do not work, why cant i return?

Not sure why they don't work, I've had many and not encountered this problem.

How are these disposed of? Can they be recycled?

Thank you for your enquiry. The Hothands items should be disposed of with regular household waste. They are not suitable for recycling.

How do these work? 'Core heat technology' as they say in the description is gibberish. re they reuseable? How long do they last for?

These products are single-use only (disposable warmers) and should never be reheated. They last up to 8 hours and keep your feet cosy and warm. The technology mechanism behind this magic is purely based on air activation. The ingredients are iron, activated carbon and water come into contact with the oxygen in the air, oxidise and produce heat. This is why you should only remove the warmers from their sachets once you are ready to use them. Hope this answered all your questions.

Color	Assorted
Size	5 Count (Pack of 1)
Style	Single
Weight	275 g
Material type	Plastic
Number of items	5
Seasons	Winter
Sport	Multi-Sport
Included components	HotHands Foot/Toe Warmers
Batteries included?	No
tech_spec_battery_description_toys	Rechargeable
Brand	HotHands
Department	Men's
Manufacturer	HotHands
Item model number	372-3988
Product Dimensions	11 x 4 x 17 cm; 50 g
ASIN	B009A88I6G

HotHandsFoot Warmers -8 hours of heat - Air activated - Ready to use

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