You step outside and before long, your foundation starts slipping, transferring onto your favourite white tee or looking patchy in the areas where you sweat the most. A good sweat-proof foundation stays put through heat and humidity while still feeling light and breathable on the skin. It keeps your makeup looking fresh without weighing it down, whether you are heading to work, running errands or spending the day outdoors. And if you have oily skin and simply want your makeup to survive sticky weather without constant touch ups, a sweat-proof foundation deserves a permanent spot in your makeup bag. Below, our favourite sweat-proof foundation discoveries you need to add to your makeup routine:Dior Forever Skin WearFor days when you want your makeup to stay exactly where you applied it, this foundation won't disappoint.