A glass skin routine is a skincare approach focused on achieving a clear, ultra-smooth, deeply hydrated, and luminous complexion by layering lightweight products that boost moisture and skin barrier health. It usually includes double cleansing (oil-based then gentle cleanser), mild exfoliation 1–2 times weekly, hydrating toner, essence, serum (often with hyaluronic acid or niacinamide), moisturizer to seal hydration, and daily sunscreen to protect the glow. The key is hydration and gentle care rather than harsh treatments, and you can customize it by choosing lightweight gel products for oily skin, richer creams for dry skin, calming ingredients for sensitive skin, and oil-balancing or pore-refining serums for combination skin to maintain a healthy, radiant look consistently.