Built of rugged 100% recycled nylon. PFC-free durable water repellent (DWR) finish helps repel rain. Highly breathable Regulator® air-mesh shoulder straps keep you cool and comfortable. Suspended mesh back-panel construction provides excellent airflow and prevents moisture buildup for all-day comfort. Sleeve inside can hold gear and is also hydration compatible (hydration reservoir not included). Top zip pocket secures small items and includes a key clip. Includes a raincover.