I'm not convinced these are actually hydrogel pads because of how quickly they dry out, it almost seems like it's just a layer of aloe and water on one side of each pad. They are definitely only one time use as they're dry within 4 hours. They do feel good when applied after breastfeeding, but if you're looking for something to aid in healing cracks or other nipple trauma, go with one of the major brand products instead of these. They're more expensive but can be used up to several days.