On Running's performance-oriented half-zip base layer top features a sleek, minimalist design with the brand’s signature 'ON' logo subtly embroidered on the left chest. Constructed from lightweight, moisture-wicking technical fabric, it offers excellent breathability and stretch for unrestricted movement during running, training, or everyday active wear. The high-neck half-zip closure provides adjustable ventilation and warmth, while flatlock seams minimize chafing. Clean lines, slim-fit silhouette, and reflective details (on some variants) enhance both function and modern aesthetic. Ideal for layering under jackets in cooler weather or wearing solo in mild conditions. Perfect for runners, fitness enthusiasts, and those seeking elevated athleisure—combines Swiss engineering precision with Scandinavian minimalism. Available in crisp White, versatile Gray, and classic Black, each color maintains the brand’s understated luxury ethos. Tags feature On’s distinctive brown kraft paper with embossed logo, reinforcing authenticity and premium feel.