The recently introduced Synapse 25 wasn’t simply a larger version of the Synapse 19 — it also debuted five new design updates to the Synapse design. Four of those design updates have now been added to the Synapse 19 (the original size of Synapse.) If you already have or plan to place a backorder for the Synapse 19, rest assured that you’ll receive the new version.

The design updates include:

Webbing Loops for Cache with Rails system: Inside the main compartment are four unobtrusive webbing loops, two fore and two aft, to which you can secure the optional Cache with Rails (available in sizes specifically for Apple laptops and the iPad; most sizes fit PCs, too). When you add the Cache with Rails, the Synapse 19 becomes a “checkpoint-friendly” laptop backpack. You can even attach two laptops or devices inside the Synapse 19 (note that only one can qualify as “checkpoint-friendly” at the airport; for everyday use, it’s great). Note that all sizes of Cache with Rails fit in the Synapse 19 with the exception of the Cache with Rails, Size 4Z (for the 15″ MacBook Pro) which only fits in the larger Synapse 25.

Bottom Pocket Piping: The bottom pocket is now piped to help it keep its shape, even when empty.

Bottom Webbing Loop: Because we care about your safety, we’ve added a 1.5″ / 38 mm webbing loop on the exterior bottom of the Synapse 19 that’s ready to accept the Guardian DF Light Strap-Mount — highly recommended if you ride a bicycle or walk in the dark.

More O-rings: Yes, we listen — we’ve added several more O-rings to the Synapse 19, including one O-ring each in the water bottle pocket and top exterior front pocket.

Wondering what the design update was that we included in the Synapse 25 but not the 19? The reconfigured organizer pockets in the left front side pocket. In the Synapse 25 left side pocket, there’s one pen/pencil slot and two wider slots for multitools/knives. In the Synapse 19, we chose to keep the three existing pen/pencil slots just as they were.

The new Synapse 19. $160. Colors Black/Steel, Black/Iberian, Black/Wasabi, Conifer/Steel, Olive/Steel, Indigo/Steel, Navy/Iberian, Navy/Ultraviolet, Nordic Dyneema/Steel, Steel Dyneema/Wasabi, Steel Dyneema/Steel are available for backorder and ship by late May. Color Steel Dyneema/Ultraviolet is available for backorder and ships by late June.

Photos of the new Synapse 19 will be posted soon.