Amsterdam-based Hollie Mercedes's Instagram feed serves up a masterclass in winter-proof layering. Visual Cliff Notes here. The overarching theme: she employs an unexpected mix of textures, colors and silhouettes, along with clever temperature-adjustable knits to bolster the foundation. Among my favorites: the Kitri zip-up pullover, above, (similar here, here and here), plus neck-covering button-ups, high v-necks, and split collared sweaters like this Varley, Acne Studio, Les Tien, and 360. Warm and toasty toppers like this and this come in for the wintry win! Photos: Hollie Mercedes