Are hydrogel masks better than cotton sheet masks?

They serve different purposes. Hydrogel masks like the BIODANCE and medicube options tend to cling more closely and are favored by reviewers for overnight or intensive hydration, while traditional cotton-essence sheets (DERMAL, MEDIHEAL) are cheaper per use and quicker. Buyer reviews don't show one format universally winning; it comes down to whether you want a quick refresh or a longer, more occlusive treatment.