Simply take the ‘tea bag’ style warmer out of its packet, shake to circulate the air and activate, wait half a minute before placing into your pocket where it will continue to get to temperature and provide warmth. You can keep the warmer in your pocket or put in your ski gloves. We recommend you try to activate the warmer before you really need it, this will help to promote blood flow in the area where you need it and will stop hands from getting cold and uncomfortable. They are air-activated, so extreme subarctic cold can sometimes slow down the chemical reaction if they don't get enough oxygen or initial warmth to activate so shake and squeeze the packets before you step outside into the cold air so the heating process starts efficiently. 6 pairs of handwarmers for the price of 5 - perfect for a week skiing or mix and match bundle offer to create your own. One pair of disposable handwarmers or choose multibuy to save more Heat for up to 8+ hours Odourless Safe and Disposable Self heating All natural ingredients