Invisible Loose Setting Powder is admittedly pricey and as someone who is super cheap it pains me to hand over $44 for a face powder. I have to say it is worth every single penny and I wish I discovered it sooner. You get a little over 11g of powder which lasts me around 3 months of daily use which is why I reserve it for the summer only. Laura Mercier recommends that you apply this powder with a fan brush but I always use a velour puff which works better on my dry skin.
I only apply this powder once in the morning and never ever have to touch it up. The hottest it gets in Toronto is around 35°C/95°F and I tend to walk a lot in the summer yet this stuff keeps my foundation and concealer in place while feeling light. I put Invisible Loose Setting Powder to the ulitmate test when I went to Florida last June. It was extremely hot and humid with severe rain everyday yet my face never got super shiney. After around 8 hours my face looks a bit dewy if it's hot out but not in a bad way.
If you have really oily skin, live in a hot climate, or need your makeup to last a long time (such as for an event) I HIGHLY recommend this stuff.
Availability: Sephora, $44 CAD