---
url: "https://onebag.travel/compare/brsq4qv334/stm-trilogy/g73g0lm6am/heimplanet-motion-arc-20/"
title: "STM Trilogy vs HEIMPLANET Motion Arc 20 - One Bag Travel"
description: "STM Trilogy vs HEIMPLANET Motion Arc 20: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/brsq4qv334/stm-trilogy/g73g0lm6am/heimplanet-motion-arc-20/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  STM Trilogy vs. HEIMPLANET Motion Arc 20

# STM Trilogy vs. HEIMPLANET Motion Arc 20

Two carry-on travel backpacks, compared spec for spec.

## [STM Trilogy](https://onebag.travel/carryon/brsq4qv334/stm-trilogy/)

by [Stm](https://onebag.travel/carryons/?brands=Stm)

![Front facing view of the STM Trilogy](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1634095801/carryons/STM_Trilogy_lukffj.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>24 L</td></tr><tr><td>Weight</td><td>0.64 kg</td></tr><tr><td>Dimensions</td><td>46×30×16 cm</td></tr><tr><td>Airline fit</td><td>94%</td></tr><tr><td>Price</td><td>$80</td></tr></tbody></table>

## Feature by feature

| STM Trilogy | Feature | HEIMPLANET Motion Arc 20 |
| --- | --- | --- |
| 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 |
| N | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2 | Water Bottle Holder | 1 |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>100% polyester</td><td>210 D Ripstop Nylon Melange with PEVR lamination</td></tr></tbody></table>

## [HEIMPLANET Motion Arc 20](https://onebag.travel/carryon/g73g0lm6am/heimplanet-motion-arc-20/)

by [HEIMPLANET](https://onebag.travel/carryons/?brands=HEIMPLANET)

![Front facing view of the HEIMPLANET Motion Arc 20](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1625723446/carryons/HEIMPLANET_Motion_Arc_20_xicwa8.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>20 L</td></tr><tr><td>Weight</td><td>0.74 kg</td></tr><tr><td>Dimensions</td><td>52×32×22 cm</td></tr><tr><td>Airline fit</td><td>70%</td></tr><tr><td>Price</td><td>$169</td></tr></tbody></table>

## Key differences between the STM Trilogy and HEIMPLANET Motion Arc 20

-   **Sternum strap:** No on the STM Trilogy; Removable on the HEIMPLANET Motion Arc 20.
-   **Water bottle pockets:** 2 on the STM Trilogy; 1 on the HEIMPLANET Motion Arc 20.

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. 133 accept both. 45 accept only the STM Trilogy, and 0 accept only the HEIMPLANET Motion Arc 20.

### Only the STM Trilogy fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, Xiamen.

## STM Trilogy vs. HEIMPLANET Motion Arc 20: which should you pack?

The **STM Trilogy** carries 4L more than the **HEIMPLANET Motion Arc 20** (24L vs. 20L), while the **STM Trilogy** is the lighter pack at 0.64kg (vs. 0.74kg). For carry-on flexibility, the **STM Trilogy** fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the STM Trilogy; if you want to travel lighter, the STM Trilogy is the better call.