We bought these Crystal Collagen Eye Mask from Qoo10 recently. They are cheap as chips and although the pack says to put it on for only 15-20minutes, we do not think that. The hydrating silicon-like patches stay hydrated for a long time and even a maximum of 20minutes does not give the maximum hydration on the eye area. We like a sheet mask but these are great for sleeping over, in our definition, wearing it to sleep. The dehydrated patches are those leftover after a night of sleep. We are always waking up with hydrated eyes. What is your anti-aging secret?