---
url: "https://onebag.travel/compare/5nit7l6pc9/boundary-supply-errant-daypack/po3vdwbsd9/tom-bihn-techonaut-30/"
title: "Boundary Supply Errant Daypack vs Tom Bihn Techonaut 30"
description: "Boundary Supply Errant Daypack vs Tom Bihn Techonaut 30: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/5nit7l6pc9/boundary-supply-errant-daypack/po3vdwbsd9/tom-bihn-techonaut-30/"
---
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3.  Boundary Supply Errant Daypack vs. Tom Bihn Techonaut 30

# Boundary Supply Errant Daypack vs. Tom Bihn Techonaut 30

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

## [Boundary Supply Errant Daypack](https://onebag.travel/carryon/5nit7l6pc9/boundary-supply-errant-daypack/)

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

![Front facing view of the Boundary Supply Errant Daypack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601602232/carryons/boundrysupplyerrant_jn6yol.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>22 L</td></tr><tr><td>Weight</td><td>1.4 kg</td></tr><tr><td>Dimensions</td><td>48×26×14 cm</td></tr><tr><td>Airline fit</td><td>93%</td></tr><tr><td>Price</td><td>$269</td></tr></tbody></table>

## Feature by feature

| Boundary Supply Errant Daypack | Feature | Tom Bihn Techonaut 30 |
| --- | --- | --- |
| Storage |
| 1 | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| back | Passport | top |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | hideable |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 16in |
| 5 | Main Compartments | 5 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>500D Duramax Kodra</td><td>400d Halcyon/420d nylon ripstop exterior</td></tr></tbody></table>

## [Tom Bihn Techonaut 30](https://onebag.travel/carryon/po3vdwbsd9/tom-bihn-techonaut-30/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>30 L</td></tr><tr><td>Weight</td><td>1 kg</td></tr><tr><td>Dimensions</td><td>50×32×21 cm</td></tr><tr><td>Airline fit</td><td>73%</td></tr><tr><td>Price</td><td>$400</td></tr></tbody></table>

## Key differences between the Boundary Supply Errant Daypack and Tom Bihn Techonaut 30

-   **Compression straps:** 1 on the Boundary Supply Errant Daypack; No on the Tom Bihn Techonaut 30.
-   **Passport pocket:** Back on the Boundary Supply Errant Daypack; Top on the Tom Bihn Techonaut 30.
-   **Backpack straps:** Yes on the Boundary Supply Errant Daypack; Hideable on the Tom Bihn Techonaut 30.
-   **Laptop sleeve:** 15in on the Boundary Supply Errant Daypack; 16in on the Tom Bihn Techonaut 30.

Both have: luggage passthrough, hip belt, sternum strap, 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. 138 accept both. 38 accept only the Boundary Supply Errant Daypack, and 0 accept only the Tom Bihn Techonaut 30.

### Only the Boundary Supply Errant 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, Emirates Airlines, Enter Air, flybe, Great Lakes Airlines, Icelandair, InselAir, Juneyao Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Regional Express, 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), Virgin Australia, Volotea, Xiamen.

## Boundary Supply Errant Daypack vs. Tom Bihn Techonaut 30: which should you pack?

The **Tom Bihn Techonaut 30** carries 8L more than the **Boundary Supply Errant Daypack** (22L vs. 30L), while the **Tom Bihn Techonaut 30** is the lighter pack at 1kg (vs. 1.4kg). For carry-on flexibility, the **Boundary Supply Errant Daypack** fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Tom Bihn Techonaut 30; if you want to travel lighter, the Tom Bihn Techonaut 30 is the better call.