The EVO Series Lid is a 500 cubic, front entry lid that comes standard with male and female side lock buckles on the front and two tension locks on the back. The EVO Lid is compatible with the both the EVO 40/56 and EVO 3300 bags to increase total volume. Can also be integrated with a Stone Glacier waist belt to create a fanny pack for short day hikes. Made in the USA. Weighs 6.4 ounces.