On Attaching a Daypack to an Osprey Sojourn Suitcase


Osprey makes the Sojourn 45, a 45L 22" rolling carry-on suitcase that can convert to a backpack.

Rolling is good for inside airports. Backpack is good for traversing snow, slush, mud, and manure.

But what to do if one is carrying the suitcase in backpack mode and one also has a daypack?

Wear the daypack in front like a baby carrier? I think not.

The suitcase itself has a solution to this problem through the provision of four D-rings attached in front:

Suitcase buckled in front    Suitcase D rings

These are designed to connect with some small and rather expensive daypacks that Osprey also makes, the 13L Daylite and the 20L Daylite Plus.

Since I wanted to continue to use my JanSport SuperBreak pack (25L) as my additional carry-on, modifications were required. JanSport SuperBreak backpack

Tools and Materials

The old-school solution for attaching things to packs is to use lash tabs.

Rectangular lash tab    Diamond lash tab

I ordered these from, a fine purveyor of straps, webbing, and associated hardware:

Straps and lash tabs

Four plastic lash tabs (of the kind they call "Four-way crossovers") and two straps (3/4 in. x 2 ft) with side-release buckles was about $10 with shipping. The lash tabs have 1" slots, but I got 3/4" webbing because larger buckles would not have fit through the D-rings on the suitcase. (Actually only one half of the buckle set fits through the D-ring. In hindsight, it might have been better to have used Strap-adjuster straps.)

For sewing the plastic lash tabs onto the daypack, I used a Speedy Stitcher sewing awl:

Speedy Stitcher sewing awl

It comes with a bobbin of tan heavy-duty waxed thread and two very fierce "No. 8" needles.

Speedy Stitcher with needle

I wanted darker and thinner thread to use on the navy-colored backpack, so I obtained this black waxed nylon thread and the Speedy Stitcher "No. 4" needle:

black thread and smaller needle

To help me avoid sticking that needle through my desk or my hand, I taped together a big brick of corrugated cardboard to use as a backstop when spearing through the lash tab:

stacked corrugated cardboard


First, I tried it out on a piece of scrap denim, since I had never used the Speedy Stitcher before.

lash tab sewn to denim,

Then, I did one on the pack.

lash tab sewn to pack,

The Speedy Stitcher comes with instructions, but it took a little practice to get going. You need to tug on the thread from both sides after each stitch. Because the needle and thread are going through plastic, there is more friction that there would be with just cloth. Too little tension, and the stitches are loose and sloppy. Too much tension, and the tab will buckle and/or the cloth will pucker. By the time I had finished, I still had not calibrated that quite right. Also, I had poked myself a few times.

After sewing a tab on each side of the pack, I realized it would have been better if the tabs were lower. Fortunately, I had spares.

lash tabs sewn to pack,

I can pretend that it was intentional to have two tabs on each side, "to maximum attachment options."

I trimmed the straps down to about 8 inches in length. Here is a tab with a strap attached, and the strap shown going through the suitcase's D-ring:

Tab with strap    Strap through D ring

Here is the completed ensemble:

suitcase with attached daypack

It's too bad that the JanSport daypack covers up the cool Osprey logo, but that's better than wearing the daypack like a baby carrier.