Sunproof Moisturizer
With its secret weapon, Mexoryl, La Roche-Posay Anthelios SX Moisturizing Cream ($29) is like armor against damaging UVA rays. Yet it's gentle on your face and leaves not a trace of sticky, stinging residue.

Rainproof Hair Shine
On gloomy mornings, preemptively mist your hair with Bumble and Bumble's Bb. Shine ($34 for four ounces), a weightless spray that gives you Breck Girl glimmer. Your frizzed-out co-workers will be amazed.

Hors D'Oeuvres-Proof Lipstick
At first swipe, Revlon ColorStay Soft & Smooth Lipcolor ($10) feels light and even a little slick, but give it two seconds to set, and you'll be ready to nosh the night away.