BeYou Monthly Period Patches are long-lasting, slow releasing and deliver cramp-numbing sensation to the skin over 12 hours. These 100% natural patches are made from steam-distilled eucalyptus and peppermint-derived menthol oils which create a unique cooling tingle. What\'s more, they\'re incredibly thin and discreet so you can say goodbye to bulky hot water bottles. Simply apply the patch to the area of concern, during the day or night, then get dressed and carry on as normal! They\'re also registered with the Vegan Society, cruelty free, and biodegradable.