Summer heat is no friend to a graceful glow. Whether your enemy is literal sweat OR you’re sweating the free radical damage smog is doing to your skin (yes, it’s a thing), adding these items to your purse before things really heat up this year is a good idea.

We asked style expert (and Instagram favourite, known for her genius #MakeMySize movement) about the tools she relies on to soothe her summer woes—from old school to indulgent.

Whether you’re running around the city (hands up if you’ve slowly melted on a subway platform in July!) or a notorious sweaty girl no matter what you do, Katie’s fave product round up is your best defense.