- Home
- Watch strap
- ISOfrane 1968 Rubber Watch Strap - Green
ISOfrane 1968 Rubber Watch Strap - Green
Original ISOfrane dive strap design, reintroduced by Synchron.
The ISOfrane dive strap traces its roots to the early era of professional dive watches. First introduced in the 1960s, its distinctive vented design and substantial rubber construction quickly made it a favorite among serious dive watch manufacturers.
Reintroduced by Synchron in 2010, today’s ISOfrane straps preserve the original tool-watch character while benefiting from modern materials and production.
Material & feel
ISOfrane straps are made from a proprietary isoprene rubber compound that offers greater density and resilience than typical rubber. The material is 100% silicone-free, hypoallergenic, non-toxic, and waterproof, making it well suited for prolonged contact with skin and regular water exposure. The rubber is lightly vanilla-scented and does not attract lint or dust the way silicone straps often do.
The strap features a ribbed underside to reduce adhesion against the skin, along with large ventilation slots that promote airflow and water drainage. Hardware is ISOfrane’s Retrosicuro buckle, available in brushed stainless steel or black DLC (diamond-like carbon) finish.
Sizing & specs Length, taper, spring bars, buckle finish and more
Length:
130mm / 75mm (fits wrists 7.0–7.75in)
Taper:
- 20mm lug / 20mm buckle
- 22mm lug / 22mm buckle
Popular watch pairings
20mm strap width fits:
- Glycine Combat Sub 39
- Omega Seamaster Diver 300M
- Omega Speedmaster Professional
- Rolex Submariner
- Tudor Black Bay Fifty-Eight
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
ISOfrane emerged during the early years of modern dive watches, developing rubber straps intended for extended use in demanding underwater conditions.
Today’s ISOfrane straps remain closely aligned with the original late-1960s design, emphasizing functional geometry and dive-focused utility rather than stylistic trends. Revived by Synchron, modern production preserves the character of the original while improving consistency and durability.
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 $49, or $5.95 on orders up to $49. 3 to 6 business days.
- USPS Priority Mail: $9.95. 2 to 4 business days.
- USPS Priority Mail Express: $25.95. 1 to 3 business days.
International
- USPS First Class International: $17.95. 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.
