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Swiss company ISOfrane initially launched this classic dive watch strap in the early 1960s. Its innovative design and material quickly made it a favored choice among the most renowned dive watch manufacturers of the 1960s and 1970s.
Reintroduced by Synchron in 2010, ISOfrane straps are now made in Italy using an improved proprietary isoprene rubber compound for even better durability and softness. These vanilla-scented straps are 100% silicone-free, hypoallergenic, and waterproof. With a ribbed underside to prevent adhesion to skin and large slots for ventilation and water drainage, they are also non-toxic and do not attract lint or dust like silicone straps.
| Specifications | |
|---|---|
Brand |
ISOfrane
|
Width Width of the strap where it attaches to the watch; a.k.a. your size.
|
20mm and 22mm
|
Lug/Buckle Taper Many straps taper in width toward the buckle. This is an important measurement if you plan to swap out the buckle or add a deployant clasp. Your buckle size matches the width at the BUCKLE end of the strap, not the lug end.
|
20mm/20mm, 22mm/22mm
|
Regular Piece Length Length of each piece, excluding buckle.
|
130mm / 75mm
|
Thickness in Millimeters |
5.5mm at lug end, decreasing to 3.5mm at tip
|
Color |
Orange
|
Stitching Color |
Unstitched
|
Pattern |
Smooth and Rally/Tropic
|
Strap Material |
Rubber
|
Water Resistance Our unscientific-but-practical categorization: Waterproof: undamaged by prolonged submersion in water. Water-resistant: resists water absorption, but not for long periods. Splash-resistant: withstands light moisture from daily use (washing hands, etc.).
|
Waterproof
|
Spring Bar Type |
Standard
|
Fits Apple Watch If Yes, select 22mm and use with our Apple watch adapter.
|
Yes
|
Rating |
(11)
|
Got this strap for my Tissot Seastar to add a professional touch. Fits perfectly and I love the vent holes they give some 80’s vibes. Strap is thick but still supple enough to fit comfortably on the wrist. I did not notice any vanilla scent but that’s fine.
I upgraded the 22mm watch band on my Garmin Fenix 8 with the Isofrane band. I like the appearance, rubber softness, buckle, and overall quality of the band. Initially, the band was not as comfortable as I liked and the strap keepers were difficult to put in place. However, after several days of use the band has become very comfortable and the keepers easier to use. I am very happy with the overall quality, appearance, and comfort! Highly recommended.
I waffled back and forth before finally deciding to pull the trigger on this strap.
I highly recommend ISOfrane and I highly recommend Holben’s!
When you’re done messin’ around buying strap after strap looking for the right one…come back here and just get the ISOfrane dive strap.
It’s thick, soft, supple, grippy and crazy comfortable.
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© 2025, Holben's Fine Watch Bands | Last updated: 12/07/2025
