Kathmandu Cotinga Kid's Pack vs. Boundary Supply Rennen X-Pac Daypack
Two carry-on travel backpacks, compared spec for spec.
Kathmandu Cotinga Kid's Pack
| Capacity | 20 L |
| Weight | 0.42 kg |
| Dimensions | 41×27×20.5 cm |
| Airline fit | 76% |
| Price | $60 |
Feature by feature
| Kathmandu Cotinga Kid's Pack | Feature | Boundary Supply Rennen X-Pac Daypack |
|---|---|---|
| Storage | ||
| Y | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| N | Passport | N |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| N | Sternum Strap | N |
| Inside | ||
| N | 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% Polyester | Custom VX21 X-Pac material |
Boundary Supply Rennen X-Pac Daypack
| Capacity | 22 L |
| Weight | 0.9 kg |
| Dimensions | 46×28×18 cm |
| Airline fit | 95% |
| Price | $170 |
Key differences between the Kathmandu Cotinga Kid's Pack and Boundary Supply Rennen X-Pac Daypack
- Compression straps: Yes on the Kathmandu Cotinga Kid's Pack; No on the Boundary Supply Rennen X-Pac Daypack.
- Laptop sleeve: No on the Kathmandu Cotinga Kid's Pack; 15in on the Boundary Supply Rennen X-Pac Daypack.
- Built-in organizer: Yes on the Kathmandu Cotinga Kid's Pack; No on the Boundary Supply Rennen X-Pac Daypack.
Both have: backpack straps, 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. 143 accept both. 1 accept only the Kathmandu Cotinga Kid's Pack, and 36 accept only the Boundary Supply Rennen X-Pac Daypack.
Only the Kathmandu Cotinga Kid's Pack fits
Gulf Air.
Only the Boundary Supply Rennen X-Pac Daypack fits
Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, flybe, Icelandair, InselAir, Juneyao Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.
Kathmandu Cotinga Kid's Pack vs. Boundary Supply Rennen X-Pac Daypack: which should you pack?
The Boundary Supply Rennen X-Pac Daypack carries 2L more than the Kathmandu Cotinga Kid's Pack (20L vs. 22L), while the Kathmandu Cotinga Kid's Pack is the lighter pack at 0.42kg (vs. 0.9kg). For carry-on flexibility, the Boundary Supply Rennen X-Pac Daypack fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Rennen X-Pac Daypack; if you want to travel lighter, the Kathmandu Cotinga Kid's Pack is the better call.