I admit, the gold foil sheet mask drew me in but, the proof is in the pudding! I've learned that the reason the out-side of these types of masks are foil, is to hel seal the serum in. The foil aids in less to none evapration. Also, the reason masks instructions say to take them off in 20 to 30 minutes, is the serum will start to re-absorb into the sheet mask itself, if you leave it on longer. So, there is a really good reason, this No:hj w4k Gold mask has gold foil on the outter side. I bought tgis mask also for the Collagen. Ive been concentrating on adding more and more Collagen to my skin care routine. I bought 2 of these masks and others with Collagen. Lately, my skin has finally become firmer, bouncier and looks healthier. I am 57, with few fine lines. I give alot of credit to Collagen based sheet masks. The serum in this mask is not real thick, nor thin. Its in the middle. Maybe a little thinner than thd white of an egg. My complexion looked brighter after using this mask. My skin became warm but, it was t the serum doing that. It was the warmth of the mask, and gave my complexion a nice glow. There is not z heavy scent either. Basically no scent at all. Thats fine with me but, doesn't matter, either way. Was this mask worth it? Definately! Would I recommend it? Yes! For any and all skin types. It seems to be gentle and caused no adverse reaction. Stock up, while they are available. It took me 2 months, to find them back in stock!