FKM rubber watch strap 20mm black Tropic Sport perforated (20/16)

Diving, not rally

An untrained eye might mistake it for a rally strap on a racing chronograph: its large holes echo the automotive straps of the sixties. Historically, though, it is a diving strap through and through, its openings meant to drain water rather than ventilate a driver's wrist. That sporty look still lets it pair with a chronograph as easily as with a diver.

The black Sport version

Black pairs with every watch, from a dress chronograph to the most technical diver.

The high-airflow diving Tropic

The Tropic Sport takes the marine strap further: three wide cut-outs in the rubber, to drain water and let the wrist breathe. It is the companion of 1960s regatta chronographs: LIP Nautic-Ski, Yema Yachtingraf or Aquastar Regate.

FKM rubber, suppleness and strength

Unlike low-grade rubbers that whiten, our FKM keeps its colour and suppleness season after season. This hypoallergenic fluoroelastomer withstands seawater, sun and perspiration without degrading. Its tapered thickness — 3mm at the lugs to 1.5mm at the buckle — lightens the wrist while keeping structure.

Silicone, rubber, FKM: telling them apart

Three words for three grades. Silicone gives itself away by a slightly tacky feel and the dust it holds. Natural rubber ages and hardens. FKM stays supple, clean and stable, even after hours in salt water.

Technical specifications

• Material: FKM rubber, 3 large holes, Tropic Sport strap pattern
• Water resistance: waterproof, dive-ready
• Dimensions: 20mm lug / 16mm buckle
• Thickness: tapered 3mm → 1.5mm
• Attachment: quick-release spring bars
• Buckle: satin stainless steel

In video: flat, in the water and kitesurfing

Our own footage: the FKM rubber strap filmed flat, underwater, then put to the test kitesurfing.

Explore other watch straps

Looking for true rally style, leather and perforations? Discover the Arezzo Maranello leather rally watch strap. To stay on diving rubber, compare with the Hirsch Pure rubber watch strap for men or our NATO watch straps in 20mm. Find every width and colour in all our rubber watch straps.