1950s: A Technical Breakthrough
The 1950s marked a turning point in watchmaking, as waterproof technology expanded the utility of watches to aquatic environments. Leather remained the strap material of choice, prompting the development of water-resistant treatments. Interestingly, stainless-steel bracelets—despite their durability—never claimed top popularity during this period.
1960s: Enter the TROPIC Strap
Rubber strap innovation began in the 1960s with the emergence of the TROPIC strap. While revolutionary, early versions were stiff, brittle, and uncomfortable against the skin. That’s when ISOfrane® challenged the status quo.
Inspired by Automotive Engineering
ISOfrane® introduced a breakthrough approach: leveraging the same rubber compound used in automotive tires—engineered to withstand heat, rain, ice, and chemical exposure without degrading. This durable material became the foundation for what would become the most resilient waterproof watch strap ever made.
Design Meets Functionality
ISOfrane® didn’t stop at durability. The brand pioneered comfort-driven design with wide ventilation slots for breathability and a textured underside that prevented sticking to skin. This combination of toughness and comfort redefined dive watch wearability.
A Modern Comeback
In 2010, the Synchron acquired the ISOfrane strap maker and revived ISOfrane®, reintroducing the world to the iconic rubber dive strap. Today, ISOfrane® stands as a symbol of uncompromising quality, long-lasting performance, and exceptional comfort.
We used the best recipe, made it non-allergic, non-toxic and added even more durability and softness to rubber WITHOUT using silicon (the dust magnet) to bring back the legendary ISOfrane® dive watch band, which is possibly the best watch strap you’ll ever buy.
Hypoallergenic, with a superior fit and feel – and 100% Silicone free! The modern ISOfrane® dive watch bands have been designed to replicate the original ISOfrane® straps. They bear the same attention to detail as the original with the ventilation straps and straight end lug attachments. The ISOfrane® watch band is the perfect addition to any dive watch – vintage or modern.
