Ryu Flex Pack 20L vs. Boundary Supply Rennen Recycled Daypack
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Ryu Flex Pack 20L | Feature | Boundary Supply Rennen Recycled Daypack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| N | Passport | N |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| removable | Sternum Strap | N |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1 | Water Bottle Holder | 1 |
| Y | Water Resistant | Y |
| Material | |
| 100% nylon with silicone coating and Polygiene® finish | RE-3™ 600/500D Eco Cordura® |
Boundary Supply Rennen Recycled Daypack
| Capacity | 22 L |
| Weight | 0.9 kg |
| Dimensions | 46×28×18 cm |
| Airline fit | 95% |
| Price | $140 |
Key differences between the Ryu Flex Pack 20L and Boundary Supply Rennen Recycled Daypack
- Sternum strap: Removable on the Ryu Flex Pack 20L; No on the Boundary Supply Rennen Recycled Daypack.
- Built-in organizer: Yes on the Ryu Flex Pack 20L; No on the Boundary Supply Rennen Recycled Daypack.
Both have: backpack straps, laptop sleeve, water bottle pockets, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 177 accept both. 0 accept only the Ryu Flex Pack 20L, and 2 accept only the Boundary Supply Rennen Recycled Daypack.
Only the Boundary Supply Rennen Recycled Daypack fits
Air Niugini, Great Lakes Airlines.
Ryu Flex Pack 20L vs. Boundary Supply Rennen Recycled Daypack: which should you pack?
The Boundary Supply Rennen Recycled Daypack carries 2L more than the Ryu Flex Pack 20L (20L vs. 22L), and the two are closely matched on weight. For carry-on flexibility, the Boundary Supply Rennen Recycled Daypack fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Rennen Recycled Daypack; if you want to travel lighter, the Boundary Supply Rennen Recycled Daypack is the better call.