MoonSwatch Mercury FKM Rubber Sailcloth-Effect Deployant Strap — Black

Our bestselling MoonSwatch strap, designed specifically for the Mission to Mercury. The sailcloth-effect texture gives the visual depth of woven sailcloth with the durability, water resistance, and comfort of military-grade FKM rubber. The brushed stainless steel deployant clasp clicks shut in one motion — no daily buckle threading — and distributes pressure evenly across the wrist.

The black colourway is colour-matched to Mercury's dark grey Bioceramic case, creating a stealthy, monochromatic look that's harder to achieve with the stock velcro. Quick-release spring bars are built in — swap it in under a minute without tools.

This strap also fits every other MoonSwatch model at 20mm. Shown on the Mission to Mercury, but equally at home on the Moon, Snoopy, EarthPhase, Neptune, or any 20mm watch in your collection.

Specifications

• Material: Sailcloth-effect embossed FKM rubber
• Clasp: Deployant (butterfly) clasp in brushed 304L stainless steel
• Lug width: 20mm — fits all Swatch x OMEGA MoonSwatch models
• Also available in 21mm for Omega Speedmaster
• Strap length: Fits wrists 13–20.5cm (5"–8")
• Buckle width: 18mm
• Buckle options: Silver (included) or Black (+£15)
• Spring bars: Quick-release (integrated, no tools needed)
• Personalisation: Optional laser engraving on deployant clasp
• Water resistance: Yes — FKM rubber is fully water and sweat resistant
• Colour: Black with black stitching

What's included

• 1x Sailcloth-effect FKM rubber strap (Black)
• 1x Deployant clasp (silver or black, selected above)
• Quick-release spring bars (integrated)
• Engraving if selected

Why this is our bestseller

The sailcloth deployant is the single most popular upgrade across all MoonSwatch models. It changes how the watch feels on the wrist — lighter and more secure than velcro, with a clasp that makes daily wear effortless. The textured finish adds visual weight that complements the Speedmaster silhouette without looking overdone.

Universal Black → | Mercury Black → | Snoopy Black → | Snoopy Khaki → | 1965 Grey → | 1965 Black → | Moon/EarthPhase Grey → | Jupiter Orange → | Mars Red → | Desert Cream → | Desert Khaki → | Lava Black →