There are countless rubber watch straps, but only one is known the world over by its brand name. The TROPIC® strap was introduced in 1955 and has been a registered trademark ever since. Every genuine one carries the name embossed on the inside. Others copied the look so completely that many people began using “tropic” as a generic word for any basket-weave rubber strap. It is not one. There is a single original, and it is the one we make.
The original, since 1955
The TROPIC® strap arrived in the mid-1950s, just as the dive watch was coming of age, and quickly became standard issue on the era’s most important tool watches. Through the fifties, sixties, and seventies it was the rubber strap divers reached for. When Synchron acquired TROPIC® in 2003, it took ownership of the original company in full: the blueprints, the tooling, and the complete manufacturing heritage. That is why the strap you buy today is a continuation of the original, not a reproduction of it.
Worn by the watches that defined diving
The TROPIC® strap’s engineering DNA equipped some of the most storied dive watches ever made, among them the Rolex Submariner, the Blancpain Fifty Fathoms, and the Omega Seamaster 300. It also served as the official strap of the French Navy’s Tudor Submariners. No imitator can claim that lineage, because the lineage is not for sale. It belongs to the original tooling and the original name.
What makes a TROPIC® a TROPIC®: the weave
The signature is the cross-hatched, tapestry-like surface, and it is functional rather than decorative. The texture promotes airflow across the wrist to reduce heat and moisture. The pattern drains water quickly. Ribbed edges give the strap lateral structure without stiffness, and the tapered profile, thicker at the watch and narrowing toward the buckle, distributes weight naturally and reduces bulk at the clasp. The deeply embossed back adds comfort. Every element earns its place; the design was very well sorted from the start.
The rubber: made in Italy, engineered to last
The genuine TROPIC® is made in Italy from a proprietary vulcanised rubber compound, developed with additives that improve UV resistance, tensile strength, and resilience to heat and cold, all without losing suppleness. It is completely PFAS-free, non-toxic, hypoallergenic, and 100% silicone-free. That matters: silicone straps, which most competitors use, attract dust, feel plasticky, and lack the structural integrity of natural rubber. The TROPIC® compound has none of those drawbacks.
Genuine versus imitation
The market is full of straps that copied the TROPIC® look. Telling the real one apart is simple. It has been a registered trademark since 1955. Synchron owns the original blueprints, the original tooling, and the brand itself. And every genuine strap has the name embossed on the inner side, exactly as it has since the beginning. If a strap does not carry that marking, it is not a TROPIC®, full stop.
Sizes and fit
The genuine TROPIC® strap is available in 20mm and 22mm lug widths. The 20mm tapers to a 16mm buckle and the 22mm tapers to 18mm, so the strap sits slim at the clasp. Usable length is 185mm with an overall length of 210mm, a comfortable fit for the vast majority of wrists.
Shop the genuine TROPIC® strap →
Frequently asked questions
Is any basket-weave rubber strap a TROPIC®?
No. TROPIC® is a registered trademark. Only straps made by Synchron, embossed with the TROPIC® name on the inner side, are genuine. Everything else is an imitation of the original design.
What sizes does the TROPIC® strap come in?
20mm and 22mm lug widths. The 20mm tapers to a 16mm buckle, the 22mm to 18mm.
Is the TROPIC® strap made of silicone?
No. It is made from a proprietary vulcanised natural-rubber compound in Italy, and is 100% silicone-free, PFAS-free, and hypoallergenic.
Which watches historically wore the TROPIC® strap?
It was fitted to icons including the Rolex Submariner, Blancpain Fifty Fathoms, and Omega Seamaster 300, and was the official strap of the French Navy’s Tudor Submariners.
Where is the genuine TROPIC® strap made?
In Italy, using the original design heritage and a modern vulcanised rubber formula.
