tumi alvington nylon backpack Alpha Bravo Navigation Backpack, 16.0", Bridle | Everyday Travel & Commute Bag, Fits Up to 15" Laptop, 16.0" X 14.0" X 7.3", Ballistic Nylon, Padded Laptop Compartment YGroup_scheme-convertible-briefcase-backpack TUMI Grey Coated Canvas and its size is Color:Seabird Grey / SBDY

tumi alvington nylon backpack Alpha Bravo Navigation Backpack, 16.0", Bridle | Everyday Travel & Commute Bag, Fits Up to 15" Laptop, 16.0" X 14.0" X 7.3", Ballistic Nylon, Padded Laptop Compartment YGroup_scheme-convertible-briefcase-backpack TUMI Grey Coated Canvas and its size is Color:Seabird Grey / SBDY

TUMI Grey Coated Canvas Stanton Hettie Backpack TUMI | TLC US

Locking zippers are easy, and hugely helpful (though I’ve recently seen techniques to bypass the lock, so I’ve softened on this as a requirement)

YGroup_scheme-convertible-briefcase-backpack

Color:Seabird Grey / SBDY

At other times, I tried to use my larger 60L pack, which was intended for backcountry camping, which was WAY too big and bulky for shorter day hikes

and its size is 43 x 33 x 18 cm.