POLAR + AUSTRAL
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THE UPGRADE79 €Save 19 € vs two beltsOne buckle, two straps. Switch your style in a click.

4.9·Based on 13 verified reviews

Free worldwide shipping · no minimum

1Your belt
POLAR

The shortcut over the pole. The belt that goes with everything.

2Your second interchangeable strap
AUSTRAL

The farthest reaches of the extreme south · the road for those who always go further.

Choose your width

Not sure? Go Slim. It fits everything. Both straps share the same buckle. The two widths cannot be mixed — choose the same width for both.

Landing in your mailbox

OrderToday
ArrivalJune 26–29
Free shipping30-day returnsLifetime buckle warrantyPouch included

One buckle. Two straps. Every style.

The Upgrade gives you one buckle and two interchangeable straps in different colors. Keep the same buckle and switch straps depending on the outfit, the mood, or the destination. The mechanism is the same as on board: slide, pull, done. Two routes, one belt.

The Upgrade · strap

The aircraft seatbelt.
Resized for your pants.

It started with one belt almost nobody notices. The one in front of you on every flight. We kept the design, kept the spirit, and adapted it to the place you actually wear a belt.

We just resized the webbing for trouser loops and switched the buckle for a lightweight aluminum one, made for daily wear.

Designed in Paris since 2012.
Featured
FR

Cadeau de départ en retraite

Ceintures offertes à notre chef pour son départ en retraite après plus de trente ans chez Air France. On cherchait quelque chose qui rappelle son parcours sans tomber dans l’objet décoratif. La boucle a fait son effet immédiatement. Plusieurs collègues ont voulu regarder le mécanisme de plus près. Très bon choix pour quelqu’un de l’aérien.

Claire B.
Verified buyer
On The Upgrade · slim· September 2024

It looks even better in person than in the photos

The photos give a good idea of what it looks like, but the buckle looks even better when worn. It has more presence, and the finish is sharper than I imagined.

Kate R.
Verified buyer
On The Upgrade · slim· June 2015

First order, a very pleasant surprise

I hadn’t heard of Fly-Belts before I stumbled upon the website. I liked the concept, but I wanted to see if the product actually lived up to it. When it arrived, I had no regrets: the belt is beautifully presented, it comes in a nice gift pouch, and it looks even better in person. What I appreciate is that it’s still wearable. It’s truly unique, but it doesn’t make you feel like you’ve bought something eccentric.

Tom B.
Verified buyer
On The Upgrade · authentic· December 2014
DE

Grün und Grau decken fast alles ab

Zwei Farben, zwei Stimmungen. Das Grüne trag ich zu Leinenhemden und Jeans, das Graue unter dem Sakko. Dieselbe Schnalle hält beide — und macht den Wechsel eher zu einem Ritual als zu einer Hürde. Schlaustes Accessoire, das ich dieses Jahr gekauft habe.

Philipp N.
Verified buyer
On The Upgrade · slim· January 2026
IT

Il sistema intercambiabile è davvero utile

Prima di provarlo, avevo dei dubbi sull'utilità di una cintura intercambiabile. In pratica, cambiarla è semplicissimo: posso abbinare due colori diversi e il sistema dà davvero l'impressione di avere due cinture senza dover accumulare pezzi.

Giulia B.
Verified buyer
On The Upgrade · authentic· November 2025
PL

Gotowe na prezent

Podobało mi się, że pasek został dostarczony w etui. Nie trzeba szukać skomplikowanego opakowania: opakowanie jest schludne, proste i wystarczające, by stworzyć prawdziwy prezent.

Tomasz R., Poland
Verified buyer
On The Upgrade · authentic· December 2023
NL

Snellere levering dan verwacht

Begin deze week besteld, een paar dagen later ontvangen. De riem was goed beschermd en de tracking was makkelijk te volgen. Niets op aan te merken.

Jeroen K.
Verified buyer
On The Upgrade · authentic· September 2023
PT

Dois estilos sem dobrar o orçamento

Eu estava em dúvida entre duas cores, e o THE UPGRADE resolveu o problema sem precisar comprar dois cintos completos. Uma única fivela, duas tiras, dois usos. É simples, mas faz todo o sentido do ponto de vista econômico :)

Tiago F.
Verified buyer
On The Upgrade · authentic· June 2023
IT

Molto pratico per il fine settimana

Per una gita di due o tre giorni è perfetto. Mi bastano un solo anello e due cinturini, e ho abbastanza scelta per diversi outfit. Occupa pochissimo spazio.

Matteo C.
Verified buyer
On The Upgrade · slim· April 2023
DE

Das Orange ist kräftiger als erwartet

Ich habe mich für das orangefarbene Modell entschieden, weil ich einen Gürtel wollte, der sich von meinen üblichen Modellen unterscheidet. Die Qualität ist wirklich gut: Die Schnalle funktioniert einwandfrei, der Riemen wirkt robust und das Gesamtbild ist originell. Allerdings ist die Farbe kräftiger, als ich mir vorgestellt hatte. Zu einer Raw-Denim-Jeans oder einem sehr schlichten Outfit passt er sehr gut. Bei bereits farbenfroher Kleidung ist es etwas schwieriger.

Jonas F.
Verified buyer
On The Upgrade · authentic· December 2021
ES

Siempre da que hablar

No pensaba que un cinturón pudiera dar tanto que hablar. La primera vez que me lo puse para ir a cenar, alguien reconoció la hebilla antes incluso de que dijera nada. Desde entonces, es casi una constante: me preguntan de dónde es. Eso es lo que más me gusta. Sigue siendo fácil de llevar, pero tiene una historia de verdad.

Mateo F.
Verified buyer
On The Upgrade · slim· February 2020
FR

J’ai bien fait de prendre la Slim

J’hésitais entre Authentic et Slim, surtout pour mes pantalons de ville. J’ai finalement choisi la Slim et c’était le bon choix : elle passe partout, même avec mes chinos. La boucle garde quand même le côté original "issu de l'avion" que je cherchais.

Julien D.
Verified buyer
On The Upgrade · authentic· November 2019
PL

Zauważyłem to u znajomego, a potem sam zamówiłem

Zauważyłem to u znajomego, zanim jeszcze poznałem tę markę. Ta klamra od razu mnie zaintrygowała. Kiedy otrzymałem przesyłkę, efekt był dokładnie taki, jak mi się podobał: oryginalny, ale łatwy do noszenia.

Michał G.
Verified buyer
On The Upgrade · slim· April 2013

Two colors. One buckle.

The buckle is shared between both straps. Switch in seconds, exactly like on board. The aluminum buckle is built to last through both.

Every combination is yours.

Every color in the collection is available for both straps. Choose any two. Every pairing says something. Make it count.

Adjusts exactly like on board.

Slide the strap through the buckle and pull to tighten. Fits any waist size up to 110 cm continuously.

Built to fit every trouser.

Two widths. Slim (38mm) fits all standard belt loops including dress trousers, chinos and slim jeans. Authentic (48mm) is the exact on-board format, for jeans and cargo pants. Both straps must be the same width — the buckle is shared.

Born in Paris. Built on one obsession.

Fly-Belts was founded in Paris in 2012. The obsession: take the most iconic piece of aviation design and make it genuinely wearable. Not as a novelty. Not as a gadget. As a real belt, built to last, worn every day. Wear the plane.

The perfect gift.

Two colors make it personal and thoughtful. Ships in a fabric pouch inspired by business class amenity kits — ready to give, no wrapping needed.

1 aluminum buckle
Shared between both straps
2 straps
Two colors, same width
Fabric pouch
Business class · gift-ready
Free shipping
Tracked · worldwide
Shipping

Free worldwide shipping on every order, with no minimum. Every order is tracked. France and Europe: 3 to 5 business days. International: 7 to 14 business days.

Returns

Returns and exchanges are accepted within 30 days of delivery, provided the belt is new, unworn and in its original packaging — the pouch delivered with your order. Return shipping costs are at the buyer's expense. Refund within 2 business days of receiving the return. Wrong width? Wrong models? Contact us and we sort it out.

Warranty · lifetime

Lifetime guarantee on the buckle

Buckle guaranteed for life. The same hardware as in commercial airliners, redesigned for your waist. If it ever fails, we replace it.

Full terms
AuthenticSlim
Width48mm38mm
Max waist110 cm110 cm
BuckleAluminum (×1, shared)Aluminum (×1, shared)
StrapsHigh-resistance woven nylon (×2)High-resistance woven nylon (×2)
Compatible withJeans, cargo pants, wide loopsAll standard belt loops
Includes2 straps + 1 buckle + pouch2 straps + 1 buckle + pouch

Both straps must be the same width. The buckle is shared.

What is The Upgrade aviation belt set?
The Upgrade is one airplane buckle belt with a second interchangeable strap that shares the same aluminum buckle, so you switch color without switching belts. The buckle reproduces the exact design of commercial airline seatbelt hardware, cast in aluminum rather than steel. Both straps share your chosen width (Authentic 48mm or Slim 38mm). Designed in Paris since 2012, with a lifetime buckle warranty and free worldwide shipping from €79.
How does the strap swap work?
Release the buckle from the first strap, clip it onto the second. Two gestures. The same buckle, a different route.
Can I mix an Authentic strap with a Slim strap?
No. Both straps must be the same width. The buckle is designed for one width at a time and cannot be shared across the two formats.
Can I choose two straps in the same color?
Yes, though most people choose two different colors to get the most out of the combination.
Will this fit my trousers?
If you choose Slim (38mm), yes. The Slim fits all standard belt loops including dress trousers, chinos, slim jeans, and most jeans. If you wear mostly jeans and cargo pants, choose Authentic (48mm).
Is the buckle really from an airplane?
The buckle reproduces the exact design of commercial airline seatbelt hardware, manufactured to the same specifications. It is cast in aluminum rather than steel to keep it light and comfortable for everyday wear.
How do I clean the straps?
Wipe with a damp cloth or hand wash in cold water with mild soap. Air dry flat. Do not machine wash.
Read all FAQs

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