The Core Jacket is the ultimate grab-and-go layer for runners who never want to miss a stride. Designed with a sleek, minimalist silhouette, it fits naturally into any training wardrobe while delivering high performance on the move. The lightweight, breathable knit fabric keeps you cool and unrestricted, and a unique spiral dart construction allows for full freedom of motion. An adjustable drawstring offers adaptable coverage, while a packable front pocket lets you stash the jacket when the weather clears. Whether you're logging miles or heading out for errands, The Core Jacket moves with you, not against you. | On Men's Core Jacket