---
url: "https://onebag.travel/compare/ahyvuk1jes/attitude-supply-atd2-backpack/ylkqy1wlx9/six-moon-design-all-day-carry-travel-backpack/"
title: "Attitude Supply ATD2 Backpack vs Six Moon Design All Day Carry Travel Backpack"
description: "Attitude Supply ATD2 Backpack vs Six Moon Design All Day Carry Travel Backpack: capacity, weight, dimensions and how many airlines accept each as a carry-on…"
source: "https://onebag.travel/compare/ahyvuk1jes/attitude-supply-atd2-backpack/ylkqy1wlx9/six-moon-design-all-day-carry-travel-backpack/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Attitude Supply ATD2 Backpack vs. Six Moon Design All Day Carry Travel Backpack

# Attitude Supply ATD2 Backpack vs. Six Moon Design All Day Carry Travel Backpack

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

## [Attitude Supply ATD2 Backpack](https://onebag.travel/carryon/ahyvuk1jes/attitude-supply-atd2-backpack/)

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

![Front facing view of the Attitude Supply ATD2 Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990291/carryons/attitude-supply-atd2-backpack-ahyvuk1jes.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>18 L</td></tr><tr><td>Weight</td><td>1.3 kg</td></tr><tr><td>Dimensions</td><td>45×25×19 cm</td></tr><tr><td>Airline fit</td><td>96%</td></tr><tr><td>Price</td><td>$475</td></tr></tbody></table>

## Feature by feature

| Attitude Supply ATD2 Backpack | Feature | Six Moon Design All Day Carry Travel Backpack |
| --- | --- | --- |
| Storage |
| 4 | Compression | 4 |
| 31L | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | front |
| Y | Passthrough | Y |
| Carry |
| removable | Backpack | hideable |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 15in |
| 2 | Main Compartments | 4 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>Challenge Sailcloth Ecopak® EPLX600</td><td>Robic Nylon (100D and 200D Challenge Sailcloth EPX200 Challenge Sailcloth ULTRA</td></tr></tbody></table>

## [Six Moon Design All Day Carry Travel Backpack](https://onebag.travel/carryon/ylkqy1wlx9/six-moon-design-all-day-carry-travel-backpack/)

by [Six Moon Design](https://onebag.travel/carryons/?brands=Six Moon Design)

![Front facing view of the Six Moon Design All Day Carry Travel Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990438/carryons/six-moon-design-all-day-carry-travel-backpack-ylkqy1wlx9.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>35 L</td></tr><tr><td>Weight</td><td>1.3 kg</td></tr><tr><td>Dimensions</td><td>55×30×18 cm</td></tr><tr><td>Airline fit</td><td>86%</td></tr><tr><td>Price</td><td>$335</td></tr></tbody></table>

## Key differences between the Attitude Supply ATD2 Backpack and Six Moon Design All Day Carry Travel Backpack

-   **Backpack straps:** Removable on the Attitude Supply ATD2 Backpack; Hideable on the Six Moon Design All Day Carry Travel Backpack.
-   **Main compartments:** 2 on the Attitude Supply ATD2 Backpack; 4 on the Six Moon Design All Day Carry Travel Backpack.

Both have: compression straps, passport pocket, luggage passthrough, hip belt, sternum strap, laptop sleeve, built-in organizer, 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. 163 accept both. 18 accept only the Attitude Supply ATD2 Backpack, and 0 accept only the Six Moon Design All Day Carry Travel Backpack.

### Only the Attitude Supply ATD2 Backpack fits

Air Niugini, Air Tahiti, American Eagle, Belavia, easyJet, Etihad Airways, Great Lakes Airlines, Gulf Air, Liat Airlines, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Scoot, Tiger Airways, Virgin Australia, WestJet.

## Attitude Supply ATD2 Backpack vs. Six Moon Design All Day Carry Travel Backpack: which should you pack?

The **Six Moon Design All Day Carry Travel Backpack** carries 17L more than the **Attitude Supply ATD2 Backpack** (18L vs. 35L), while the **Attitude Supply ATD2 Backpack** is the lighter pack at 1.3kg (vs. 1.3kg). For carry-on flexibility, the **Attitude Supply ATD2 Backpack** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Six Moon Design All Day Carry Travel Backpack; if you want to travel lighter, the Attitude Supply ATD2 Backpack is the better call.