As winter calls for cosy essentials, skims answers with its First Layers collection: a performance-driven range of thermoregulating base layers crafted for both form and function. This playsuit delivers on every front, featuring quick-drying technology, a sport-inspired half-zip and seamless construction that lends itself to layering and ensures an enduringly sleek finish. uk size conversion: xxs = uk 0, xs = uk 2-6, S = uk 8-10, M = uk 12-14, L = uk 16-18, xl = 18-20, 2X = uk 20-22, 3X = uk 24-26, 4X = uk 28-30