What entails a good oil-free moisturizer? When it is 100 degrees outside and you can wear an oil-free moisturizer that will not make you feel like you are wearing a sweat mask. It also has the ability to absorb excess oil from your skin (especially if you have oily skin) without drying out the skin and making your skin feel like it is a shriveled up prune. It must keep your skin hydrated because we all know that in the summertime our skin will become sweaty and hot and smelly. In the wintertime, there are a whole new set of considerations to deal with. If you are out in the bitter cold winter air your skin will become dry, chapped and irritated.