"Glass Skin", or an extremely dewy, non-shimmery glow, is a trend made popular by South Korean celebrities and media. But the traditional methods of achieving it - face glosses, creamy foundations etc - are not always great for real life (or warmer weather).
Well there IS one forgotten product that can achieve this effect without feeling like an oil-slick or smearing off after 2 hours. MAC's classic Face and Body is an ultra glowy film-forming foundation that actually sets looking like it's wet. And because it's made for use on bodies during shoots, it's transfer resistant and sweat resistant. What better to get the glass skin effect without the cons?
The thing is many people these days no longer use or even know of Face and Body, and I have to say it's got a strange texture and seems to have zero coverage at first, but there are some tricks for getting it to work beautifully.
Rubbing it on with fingers ALWAYS works better than brushing it on or sponging it on. The rubbing seems to allow the pigmentation to show more, so you get more coverage. Plus - this formula just soaks into bristles and sponges and can be a pain to wash out when it sets. Also, it's fantastic for layering. I've layered up to 5 coats for more coverage and it still looks beautiful and skin-like although the sheen by then is over the top.
I do like MAKE UP FOR EVER and Dior's versions but those are less dewy. So if "Glass Skin" is what you're trying to achieve, this is the only one that will give you that.