---
url: "https://onebag.travel/compare/10tqh8wtds/gossamer-gear-mariposa/5uozk4l5zy/ks-ultralight-ks27/"
title: "Gossamer Gear Mariposa vs KS Ultralight KS27"
description: "Gossamer Gear Mariposa vs KS Ultralight KS27: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/10tqh8wtds/gossamer-gear-mariposa/5uozk4l5zy/ks-ultralight-ks27/"
---
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3.  Gossamer Gear Mariposa vs. KS Ultralight KS27

# Gossamer Gear Mariposa vs. KS Ultralight KS27

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

## [Gossamer Gear Mariposa](https://onebag.travel/carryon/10tqh8wtds/gossamer-gear-mariposa/)

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

![Front facing view of the Gossamer Gear Mariposa](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990365/carryons/gossamer-gear-mariposa-10tqh8wtds.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>36 L</td></tr><tr><td>Weight</td><td>0.9 kg</td></tr><tr><td>Dimensions</td><td>56×28×14 cm</td></tr><tr><td>Airline fit</td><td>47%</td></tr><tr><td>Price</td><td>$315</td></tr></tbody></table>

## Feature by feature

| Gossamer Gear Mariposa | Feature | KS Ultralight KS27 |
| --- | --- | --- |
| Storage |
| 2 | Compression | 2 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| N | Passport | top |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| N | Laptop | N |
| 1 | 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>100D &amp; 210D Recycled Robic Nylon</td><td>X-pac VX 07 YKK "waterproof zip"</td></tr></tbody></table>

## [KS Ultralight KS27](https://onebag.travel/carryon/5uozk4l5zy/ks-ultralight-ks27/)

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

![Front facing view of the KS Ultralight KS27](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990375/carryons/ks-ultralight-ks27-5uozk4l5zy.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>27 L</td></tr><tr><td>Weight</td><td>0.3 kg</td></tr><tr><td>Dimensions</td><td>55×28×16 cm</td></tr><tr><td>Airline fit</td><td>87%</td></tr><tr><td>Price</td><td>$130</td></tr></tbody></table>

## Key differences between the Gossamer Gear Mariposa and KS Ultralight KS27

-   **Passport pocket:** No on the Gossamer Gear Mariposa; Top on the KS Ultralight KS27.
-   **Main compartments:** 1 on the Gossamer Gear Mariposa; 2 on the KS Ultralight KS27.

Both have: compression straps, backpack straps, 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. 89 accept both. 0 accept only the Gossamer Gear Mariposa, and 75 accept only the KS Ultralight KS27.

### Only the KS Ultralight KS27 fits

Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Malta, Air Mauritius, Air Serbia, Air Seychelles, All Nipon Airways, ANA, Asiana Airlines, ATA Airlines, Austrian, Azerbaijan Airlines, Blue Air, Boliviana de Aviacion, Brussels Airlines, Bulgaria Air, China Eastern, Czech Airlines, Emirates Airlines, Enter Air, Ethiopian Airlines, Eurowings, Fiji Airways, Flair Air, flybe, Gol Linhas Aereas, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Japan Airlines, Jet Airways, Juneyao Airlines, Kenya Airways, KLM, LATAM , LOT Polish, Lufthansa, Luxair, Mahan Air, Meridiana Fly, Mesa Airlines, Nordwind Airlines, Norwegian, Pakistan International, Peach, Porter Airlines, Royal Brunei Airlines, Ryanair, S7, SAS Scandinavian, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Turkish Airlines, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

## Gossamer Gear Mariposa vs. KS Ultralight KS27: which should you pack?

The **Gossamer Gear Mariposa** carries 9L more than the **KS Ultralight KS27** (36L vs. 27L), while the **KS Ultralight KS27** is the lighter pack at 0.3kg (vs. 0.9kg). For carry-on flexibility, the **KS Ultralight KS27** fits 87% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Gossamer Gear Mariposa; if you want to travel lighter, the KS Ultralight KS27 is the better call.