If you often travel with low-cost airlines, you know how much of a difference it can make to have a piece of luggage that fits within the free size limits. In this article, you’ll learn everything there is to know about carry-on backpacks: what they are, why they’re a good choice, how to choose them, and which models we recommend for comfortable travel without any surprises.

The new frontier of low-cost travel calls for ever-new strategies and products to meet the demands of low-cost airlines, which over time have tightened their guidelines—especially regarding free carry-on backpacks, that is, those that can be brought on board without incurring additional fees that sometimes exceed the price of the ticket itself. In this article, we’ll explore how luggage manufacturers have adapted to these standards and how Underseater backpacks have become the ideal solution for avoiding additional fees. 

What is an underseater bag?

The name “Underseater” refers to a type of backpack that can be stowed under an airplane seat. Its compact size makes it perfect not only for those who like to travel comfortably and light but also for those who don’t want to purchase additional carry-on or checked luggage. As we explained in a previous article on Ryanair’s backpack size requirements, the Irish airline has very specific measurements for carry-on luggage, and other airlines have largely adapted to these standards. Unlike the classic trolley bag meant for the overhead compartment, the main advantage of underseat luggage is that it’s always within easy reach and accessible at any time during the flight.

What to Look for in a Good Carry-On Bag

Typically, their internal layout mirrors that of a carry-on trolley, featuring one or two spacious compartments for storing clothing and reducing bulk using special adjustable straps and several pockets, on the front and sides for storing all the essential travel accessories, such as boarding passes or a passport. The lightweight design and ergonomic shoulder straps are another feature not to be overlooked, especially when traveling with children, as they enhance travel comfort. Finally, dimensions are crucial: Ryanair, for example, requires a maximum size of 40x20x25 cm; for other airlines, we recommend checking the updated size requirements on the airline’s website before you leave.

The Best Underseat Backpack Models on Studioarch

  • Lightweight, durable fabric—Lightweight with adjustable drawstrings for volume control
  • Full-length back opening
  • Well-organized interior with a separate zippered compartment
  • Side handle for carrying by hand

So, if you've decided to Travel Smart, the underseater backpack is the one for you. All you have to do is check out all the available models in the dedicated section of the website and set off on unforgettable trips!

Latest Blog Posts:

Accessori da uomo PE 2026: marsupi, zaini e tracolle

Marsupio, zaino monospalla, zaino porta PC o tracolla? Guida agli accessori da uomo Primavera-Estate 2026: come scegliere quello giusto per stile ed esigenze

Read more
Il Blog di Studioarch.com

Borsa spiaggia o city bag? Guida alla borsa per le vacanze

Mare o città d'arte? Scopri come scegliere tra borsa spiaggia e city bag e organizzare la borsa vacanze con pochette e organizer: consigli pratici e modelli

Read more
Il Blog di Studioarch.com

Nuove regole UE sul bagaglio a mano: cosa cambia davvero

Riforma UE approvata a luglio 2026: bagaglio personale garantito, tariffe trasparenti, tutele per famiglie. Cosa cambia davvero e da quando: la guida completa

Read more
Il Blog di Studioarch.com

Borse leggere 2026: il ritorno del nylon chic tra stile, praticità e design contemporaneo

Le borse leggere dominano la Primavera-Estate 2026: nylon tecnico e tessuti gommati firmati Gherardini, Bric's X-Travel e Ynot Cloud reinterpretano il lusso in chiave pratica, morbida e contemporanea.

Read more
Il Blog di Studioarch.com
Product added to wishlist