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Bonetto Cinturini 328 Rubber Military Watch Strap - Steel Blue

Made in Italy from vulcanized NBR rubber. Waterproof, UV-resistant, and nonallergenic.

$55.00
Strap width:20mm
Ships same or next business day • Free U.S. shipping over $59 • Easy 60-day returns

Model 328 translates the classic military pass-through strap into rubber, with a broad one-piece layout, fine ribbed texture, and simple hardware. The flat profile and uninterrupted surface give it a straightforward utilitarian look that suits tool and dive watches especially well. The removable secondary layer allows the strap to be converted from a traditional double-pass layout to a lower-profile single-pass configuration.

Material & feel

Model 328 is made from vulcanized nitrile butadiene rubber (NBR), a material chosen for its durability, flexibility, and resistance to seawater and sunlight. The vulcanization process strengthens the rubber while preserving a controlled, supple feel.

The strap is constructed from two thin layers of rubber, each about 1.5mm thick, creating a structure that bends easily around the wrist. The finely ribbed texture provides subtle grip and visual definition while remaining understated compared to heavily patterned rubber straps. Sandblasted stainless steel hardware reinforces the utilitarian character and keeps reflections muted.

Learn more in our Rubber Watch Strap Guide.

Sizing & specs Length, taper, spring bars, buckle finish and more
Length:
260mm
Measurements exclude the buckle.
Fits wrists:
6.5–8.0in
Spring bars:
Standard (free pair included)
Buckle:
Matte stainless steel
Thickness:
3.0mm
Sheen:
Matte
Fit guidance

Bonetto Cinturini military rubber straps use adjustable keepers to set the fit on the wrist. Excess strap length is folded back and secured rather than trimmed. The secondary pass-through layer can be removed to convert the strap to a single-pass configuration with less height under the watch.

Popular watch pairings

20mm strap width fits:

22mm strap width fits:

  • Orient Kamasu
  • Orient Ray II
  • Tudor Black Bay
Wear & care

Swim ready, suitable for swimming and regular water exposure.

Clean with lukewarm water and mild soap as needed. Rinse thoroughly and allow to air dry fully. Avoid solvents, abrasives and petroleum-based cleaners.

About the brand

Bonetto Cinturini is an Italian manufacturer with more than forty years of experience producing rubber watch straps for professional and everyday use. The brand specializes in straps made from vulcanized nitrile butadiene rubber, selected for its durability, flexibility, and resistance to seawater and UV exposure.

Bonetto Cinturini straps are widely used by watch manufacturers and enthusiasts who value long-term performance, comfort, and straightforward, functional design.

Shipping

Orders placed by 2:00pm PST on business days typically ship the same day.

Tracking is included with every order and emailed at shipment.

United States

  • USPS Ground Advantage: free on orders over $59, or $6.95 on orders up to $59. 3 to 6 business days.
  • USPS Priority Mail: $11.95. 2 to 4 business days.
  • USPS Priority Mail Express: $28.95. 1 to 3 business days.

International

  • USPS First Class International: $18.95. 10 to 21 business days.

For complete shipping details, see our Shipping Policy.

Returns & exchanges

Unused items may be returned or exchanged within 60 days of purchase. Please contact us before sending an exchange.

For full return details and instructions, see our Returns Policy.

  • 5 stars: 76 (90%)
  • 4 stars: 7 (8%)
  • 3 stars: 1 (1%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
B
Blake

I picked up the Bonetto Cinturini 328 Rubber in Blue 294 for my Pelagos FXD MN. It is literally the perfect match to the blue of the FXD MN. I love the versatility of being able to use it as a single or double pass NATO. The rubber is soft, and pliable but a good strength to it. Smells of vanilla. It feels quality. Mike with Holben’s was fabulous, shipping it out PDQ. Now trying to not order an orange and gray one!

B
Bogdán T.
i love it!!!

It fit so good on my arm with my seiko!I love it!!!

D
Don
My Favorite Band

This thin, light weight, flexible band with a nice amount of stretch is my go to pick for multiple watches.
I removed the extra pass of rubber and the extra metal keepers to create the most comfortable single pass strap I own.
This strap is very long apparently to allow wearing over a wet suit, but it cuts down very easily with a razor blade, knife , or sharp scissors to allow a custom length of tail after the keeper.
A plastic water bottle lid or coin made a nice guide for cutting the end to perfect length.
Ordering more for sure!

P
Phil R.
Good Quality Band

This was a great purchase. Was looking for an alternative to my factory Tudor rubber FXD rubber band. This easily converted to a single pass band by removing two spring pins and the secondary strap. Not as thick as the factory strap but cleaner and smoother. Good value.

G
G.G.
Just found my Favorite NATO

I Just found my Favorite NATO and its Rubber from Bonetto Cinturin! Fit is perfect and its very comfortable. Perfect all around strap.

R
Ron D.
Great Rubber Strap!

The best rubber strap I have. It's comfortable and strong for being thin. Will buy another one. Holben's is where it's at!

G
Gary T.
Best NATO I own!

This is the perfect NATO for my use. I wanted a strap that was lite, that was rubber, that smelled great, and looked good. Plus you easily make it a single pass ZULU. I wish they had it in Orange.

G
Gentry T.
Great all rounder.

One of the best NATO straps I've ever experienced. Strapped my Sinn EZM 3 on and the perfect pair for a diver or for daily wear. Easy on the wrist, greats looks, durable and easy to clean!

C
Cosmo
Best NATO Strap Ever!

I can't say enough good things about this rubber NATO strap! First, it's very supple and fits my wrist perfectly. I was able to trim the end off so that I don't have to double the strap over into the second metal keeper. I used an X-Acto knife and a coin to keep the end of the band rounded. Another thing I really like about this NATO strap is that it's not so thick that my watch sits too high on my wrist. It has a very low profile since it's just 1.5mm thick. I wear it on a Sinn 356 acrylic Flieger and I like the look of this combination (check out the attached photo). Finally, the strap has a slight hint of vanilla which is actually kind of pleasant. The scent is less pronounced now after a few days of wearing it, though. If you're into NATO straps, you should definitely look into owning one from Bonetto Cinturini.

j
jeff d.
Vanilla scented lovely nato

Beauty. Such a lovely italian rubber strap. I have the 20mm version in navy on my newly acquired seiko sbdc053. 7 inch wrist. Fits perfect.

S
Stroppy
New Favorite Nato

My new favorite Nato. Not sure why it's vanilla scented, but that doesn't detract from the quality of the strap. However you may develop a craving for cookies or a brownie. I've got it on a Seamaster Professional Apnea and it looks great. Strong enough to stand up to the weight of the watch without being bulky itself. I wish they carried the other colors in this series,

C
Cosmo
Best NATO Strap Ever!

I can't say enough good things about this rubber NATO strap! First, it's very supple and fits my wrist perfectly. I was able to trim the end off so that I don't have to double the strap over into the second metal keeper. I used an X-Acto knife and a coin to keep the end of the band rounded. Another thing I really like about this NATO strap is that it's not so thick that my watch sits too high on my wrist. It has a very low profile since it's just 1.5mm thick. I wear it on a Sinn 356 acrylic Flieger and I like the look of this combination (check out the attached photo). Finally, the strap has a slight hint of vanilla which is actually kind of pleasant. The scent is less pronounced now after a few days of wearing it, though. If you're into NATO straps, you should definitely look into owning one from Bonetto Cinturini.

A
Anonymous

Best band ever

C
Christopher
Bonetto Cinturini 328 in steel blue

I picked up yet another Bonetto Cinturini 328 NATO strap, this time in steel blue. Very unique color which pairs well with black or silver dialed watches. I get a lot of compliments on this one. Super comfortable for year-round wear.

C
Christopher
Bonetto Cinturini 328 light gray NATO

This is the second Bonetto Cinturini 328 in light gray I have purchased from Holben's. Not only is it the best rubber NATO strap out there, but I think it is the best NATO in any material, period. The light grey goes with pretty much any dial or case color. Great style and comfort. You can't go wrong with this strap.

C
Christopher
The best NATO out there

I picked up the Bonetto Cinturini 328 Light Grey NBR Rubber NATO, the latest of many Bonetto Cinturini purchases. Not only is this the finest Rubber NATO, but I think it is the best NATO, period. Super comfortable and stylish. This shade of grey is fantastic. Looks very much like Admiralty Grey on my CWC watch Great price and value.

C
Christopher
Bonetto Cinturini the best

I picked up the Bonetto Cinturini 328 Steel Blue NBR Rubber NATO, the latest of many Bonetto Cinturini purchases. Not only is this the finest Rubber NATO, but I think it is the best NATO, period. Super comfortable and stylish. This shade of blue is fantastic. Great price and value.

S
Stephen L.
Exactly what I was looking for

I was looking for a rubber nato for when I swim and bike and this fits the bill. The rubber is good quality with a strong buckle and have no concerns of losing it when I am doing phycical activity.

C
Christopher
Bonetto Cinturini NATO in Azure Blue

Being a big fan of Bonetto Cinturini NATO straps, I decided to pick up the Azure Blue. Lovely color and super comfortable. Looks fantastic with any silver, white or black dialed dive watches. Outstanding quality and value!

C
Chris
The best rubber NATO

These are the best aftermarket straps I've found. They are durable and wear very comfortable, they look and feel premium for a budget price.

C
Christopher
Bonetto Cinturini NATO -- bold and beautiful

I purchased the Bonetto Cinturini NATO in yellow for my Mk II Fulcrum 39. This is a fantastic summer strap... comfortable, handsome and naturally water resistant. Looks great with the black dial and bezel insert. Great price and quality. Will definitely be purchasing this strap in other colorways.

C
Christopher
Simply the best rubber NATO out there

I've purchased many NATO straps, but the rubber one offered by Bonetto Cinturini in EMERALD GREEN is absolutely the best there is. Looks and smells great and super comfortable. Remarkable price for this quality strap as well. It is a winner!

C
Chris
Extremely comfortable and versatile strap for divers

This has become my favorite strap for dive watches. It just works, its laid back but still looks put together. I find it comfortable even in hot weather. It's easy to install and adjust. It is of course waterproof. It smells good too, but you may not want to buy this if scents bother you. I think this price is good for the quality of the strap.

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