[Zipper] it's well made, very lightweight, and carries very light on the shoulder. I would recommend it to anyone that carries a laptop or iPad and a few chargers.

[Dense Teal Blue] I just got back from 9 days in Thailand and needed a bag that would hold everything PLUS be carry on approved. This bag held everything down tight and I had my laptop inside the computer compartment. Loved all the extras you don't notice until you get the bag. Security features are awesome and I wonder who thought of them because they rock. This bag is has super clean lines when everything is cinched down and made it super easy putting in overhead plane bins, bus bins, on ferry's and carrying on my back when riding a moped. The ability to hide the waist straps is really good. When traveling I saw so many other travelers with waist straps that just hang free. Why is this an issue? When stopping at bathrooms, for example, they put their bags on the floor and the straps are resting on really gross bathroom floors; in Thailand some of the toilets are just holes in the floor and a bucket of water to "flush." My bag straps where neatly tucked away. The top hard case is such an amazing feature and the hidden water bottle compartment. My girlfriend had a similar Northface bag and she keeps bugging me to buy her one of these. Only thing I would change is something I read in another persons review; I'd change the orientation of the top hard safety compartment's zipper. When the bag is laying flat, say on a bed, and the straps for the bag are on the bottom side, if one opens the hard case anything loose will fall out. It's not a big issue at all though. I also bought travel cubes and that made a huge difference. Twice I was stopped by TSA and they searched my bag; travel cubes made it SO easy to put everything back and get on my way!

Long story short, do not hesitate to purchase this bag! I never leave reviews but felt this bag deserved it.

[Zipper] I bought this for my boyfriend and he absolutely loves it!

[Zipper] After lots of research between patagonia, the north face, and nike/adidas backpacks, I finally bought the thule lithos 20L for college. And I feel like all my research paid off. This backpack is the perfect size for bringing all the supplies needed for class. The zippers are very smooth and feel high quality. The fabric holds its shape, so it gives the backpack lots of structure and a nice thickness. The waterbotle holders are roomy for my slim water bottle, but might not work for those huge hydro flask bottles. The front pocket snaps back into place very satisfyingly. And perhaps most importantly, it's so comfortable to wear!

[Zipper] It is the perfect size to carry to work and school as a backpack and compact to attach to your carry-on luggage for travel. Highly recommended if you don't like to check-in bags at the airport.

[Empty] This backpack is the perfect size and weight for work. Big water bottle pocket - laptop fits perfect and the perfect pockets for extras. I'm very happy with it!!

[Zipper] Bag is good for laptop and maybe a few other things. Not bulky and super light, won’t really fit a big lunch bag but can do smaller containers

[Yes] This backpack is the perfect size for my commute! It’s high quality and stylish! The only issue…I love it so much, that now I want a larger one for travel.

[Yes] I took this with me backpacking through Switzerland and Greece! It was absolutely perfect. I love how the zipper opens the middle compartment similar to a suitcase. This feature makes it so much easier to get your belongings out. It prevents digging through everything to find what you are looking for. I picked the 40L since we were only backpacking a week at a time. The size was perfect for me. I am 5'3 and even filled to the max this backpack was not too heavy or big for me. I was able to use this as a carry on with no issue on 4 flights (each a different airline). Oh and the green is awesome! I highly recommend this product!!

[1.295 lb] just what I was looking for. very well made. keep up the good work Thule!