From the YNOT Website:
"The Magnetica is the ultimate travel companion. Whether you are braving the wilderness or the city streets, this backpack will keep all your gear safe and dry. Auto-locating magnetic hardware makes frequent access to your backpack more convenient than ever. The external laptop compartment keeps technology at-the-ready and securely in place. A separated liner provides even more organization: you’ll never have to mix up your clean and dirty clothes again."