You use a zipper to close this bag. This hiking backpack is made exclusively from nylon and it is primarily intended to be used by women.
From Ellis Brigham
Osprey Tempest 9 Women's Backpack - Aluminum Grey M/L
Sigma Sports
Osprey Tempest 9 Womens Backpack - Aluminium Grey
Hardloop
Osprey Tempest 9 - Hiking backpack - Women's Aluminum Grey M/L