DESC: Weather any storm with the Monsoon, packed with unique features like a flip-down strap pocket to operate your MP3 player without removal and a FLEX-USE sleeve to secure, depending on your travel situation, either a 17" laptop or hydration reservoir (not included). Yoke-style, S-shaped backpack straps with Vapel(tm) mesh AIRFLOW(tm) padding keep you comfortable and cool. Lifetime warranty.