In hot and humid cities, skin loses moisture through sweat and time spent in air-conditioned environments; while UV rays and other environmental factors can heighten our susceptibility to oxidative stress. We recommend the daily use of clarifying formulations to lift excess sebum and sunscreen, and lightweight but efficacious hydration to replenish skin without burdening its surface. Complement an effective daily regimen with twice-weekly application of a deep cleansing masque.