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The Synapse 19 is the supreme backpack for everyday carry, ultralight travel, or a day hike. The original of the Syn- backpacks, the Synapse 19 was designed with ultimate utility in mind:
Main compartment with 2 O-rings
Interior, banded open-top pocket
5 exterior front pockets with independent volume
Comfortable, durable, edgeless should
4.9
396 ratings
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My perfect smallest size backpack for day to day
At this moment I am using my Synapse 19 for the first time. Im on a short vacation trip on which I am traveling as light as possible. For once I did not bring a computer, so I did not need a padded compartment so did not need to carry the slightly extra size and weight of my Synik 22. I did not want to fuss with underpacking a backpack to be absolutely sure of having the gate agent let me board with it. This bag is just big enough for the straps to adequately stay on my shoulders without using the sternum strap. The bag is small enough to be barely noticeable as i carry it, and easy to sling off and on.
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Tom · 1 day ago
Excellent bag for travel
I purchased the Synapse 19 for domestic and international travel. I am 5’3” and am a frequent flyer who doesn’t check bags. This bag fits perfectly under airline seats on regional and mainline aircraft. It is compact and the design is so clever I can fit everything I need - 24 oz water bottle, electronics, toiletries, extra clothes, rain jacket, and a crossbody bag (either the Side Kick or Side Hustle). I use key straps to securely connect valuables such as wallet, passport and jewelry. It is very comfortable to wear for a full day of hiking and sightseeing.
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Marjorie · October 30, 2026
My favorite bag
I originally had a brain bag that i was using as an edc but was able to lighten my load qnd get this one. Its much lighter, comfy, and fits me so much better (my torso is about 15in) i also love the water bottle space because usually mine fall out of the regular ones so this was a great addition. Plus it carries my 16in laptop just fine, though to be fair i never bother with a cache or anything. Regardless i absolutely love it