A high performance cap perfect for running, climbing, cycling, and more. The Deep River is a super light-weight extra flexible and packable style, ultra breathable with high visibility features. Made to stay on with ultra-low fit and buckle closure. A high performance cap perfect for running, climbing, cycling, and more. The Deep River is a super light-weight extra flexible and packable style, ultra breathable with high visibility features. Made to stay on with ultra-low fit and buckle closure.