---
url: "https://onebag.travel/compare/3la3efqguy/stm-prime/atgkh5rntd/alchemy-equipment-daypack/"
title: "STM Prime vs Alchemy Equipment Daypack - One Bag Travel"
description: "STM Prime vs Alchemy Equipment Daypack: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/3la3efqguy/stm-prime/atgkh5rntd/alchemy-equipment-daypack/"
---
1.  [Home](https://onebag.travel/)
2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  STM Prime vs. Alchemy Equipment Daypack

# STM Prime vs. Alchemy Equipment Daypack

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

## [STM Prime](https://onebag.travel/carryon/3la3efqguy/stm-prime/)

![Front facing view of the STM Prime](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601123578/carryons/stmprime_yfxzkc.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>15 L</td></tr><tr><td>Weight</td><td>0.7 kg</td></tr><tr><td>Dimensions</td><td>42×26×13 cm</td></tr><tr><td>Airline fit</td><td>96%</td></tr><tr><td>Price</td><td>$80</td></tr></tbody></table>

## Feature by feature

| STM Prime | Feature | Alchemy Equipment Daypack |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 2 |
| top | Passport | front |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 13in | Laptop | 13in |
| 2 | Main Compartments | 2 |
| N | Organizer | N |
| 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>Polyester</td><td>Waxed 600 denier Kodra (100% polyester) Embossed lining (100% polyester) Base: 3x PU-coated 900 denier Kodra</td></tr></tbody></table>

## [Alchemy Equipment Daypack](https://onebag.travel/carryon/atgkh5rntd/alchemy-equipment-daypack/)

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

![Front facing view of the Alchemy Equipment Daypack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601602046/carryons/alchemydaypack_oropei.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>0.6 kg</td></tr><tr><td>Dimensions</td><td>43×36×13 cm</td></tr><tr><td>Airline fit</td><td>86%</td></tr><tr><td>Price</td><td>$150</td></tr></tbody></table>

## Key differences between the STM Prime and Alchemy Equipment Daypack

-   **Opening:** Other on the STM Prime; Rolltop on the Alchemy Equipment Daypack.
-   **Passport pocket:** Top on the STM Prime; Front on the Alchemy Equipment Daypack.

Both have: backpack straps, sternum strap, laptop sleeve, 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. 162 accept both. 19 accept only the STM Prime, and 0 accept only the Alchemy Equipment Daypack.

### Only the STM Prime fits

Aerolineas Argentinas, Air France, Air India, Air Mauritius, Air Niugini, Air Tahiti, Boliviana de Aviacion, Cayman Airways, flybe, Great Lakes Airlines, Indigo, InselAir, Jet Airways, Kenya Airways, KLM, LATAM , Regional Express, Sky Airlines, Virgin Australia.

## STM Prime vs. Alchemy Equipment Daypack: which should you pack?

The **Alchemy Equipment Daypack** carries 5L more than the **STM Prime** (15L vs. 20L), while the **Alchemy Equipment Daypack** is the lighter pack at 0.6kg (vs. 0.7kg). For carry-on flexibility, the **STM Prime** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Alchemy Equipment Daypack; if you want to travel lighter, the Alchemy Equipment Daypack is the better call.