OPPOSETHIS Invisible CARRY-ON backpack vs. STM Grace
Two carry-on travel backpacks, compared spec for spec.
OPPOSETHIS Invisible CARRY-ON backpack
| Capacity | 21 L |
| Weight | 0.85 kg |
| Dimensions | 47×32×15 cm |
| Airline fit | 92% |
| Price | $255 |
Feature by feature
| OPPOSETHIS Invisible CARRY-ON backpack | Feature | STM Grace |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 4 |
| Y | Passport | N |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| N | Water Bottle Holder | N |
| Y | Water Resistant | Y |
| Material | |
| 800x600D lightweight waterproof nylon-polyester blend | 100% polyester |
Key differences between the OPPOSETHIS Invisible CARRY-ON backpack and STM Grace
- Opening: Clamshell on the OPPOSETHIS Invisible CARRY-ON backpack; Top zip on the STM Grace.
- Passport pocket: Yes on the OPPOSETHIS Invisible CARRY-ON backpack; No on the STM Grace.
- Sternum strap: Yes on the OPPOSETHIS Invisible CARRY-ON backpack; No on the STM Grace.
Both have: backpack straps, laptop sleeve, built-in organizer, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 174 accept both. 0 accept only the OPPOSETHIS Invisible CARRY-ON backpack, and 6 accept only the STM Grace.
Only the STM Grace fits
Air Niugini, Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska.
OPPOSETHIS Invisible CARRY-ON backpack vs. STM Grace: which should you pack?
The OPPOSETHIS Invisible CARRY-ON backpack carries 1L more than the STM Grace (21L vs. 20L), while the STM Grace is the lighter pack at 0.6kg (vs. 0.85kg). For carry-on flexibility, the STM Grace fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the OPPOSETHIS Invisible CARRY-ON backpack; if you want to travel lighter, the STM Grace is the better call.