MonoPass™ FKM
The first pass-through FKM built for a deployant.
Single-pass rubber in our AnchorFlex compound, 1.5mm thick, with ten micro-adjustment holes for a near-custom fit.
Requires a MonoPass™ clasp. Works with both the original and the Precision Deployant Clasp. Not compatible with the Standard Deployant Clasp.
What MonoPass fixes
A traditional pass-through strap doubles under the watch, closes with a buckle you have to fumble, and leaves a tail to tuck away. MonoPass is a single-pass design: no second layer beneath the case, no excess length, and a deployant clasp that opens and closes like a bracelet.
That last part matters more than it sounds. A deployant stays a closed loop even when it's open, so the watch stays on your wrist while you fasten it — the same way a bracelet does. A buckle strap comes fully apart, which means balancing the watch in one hand while you thread the other end through a keeper. MonoPass goes on the way a bracelet goes on: one motion, one hand, watch never loose.
Clasp compatibility
Works with both MonoPass clasps Any MonoPass strap takes any MonoPass clasp in the same lug width — both the original MonoPass Deployant Clasp and the newer MonoPass Precision Deployant Clasp. A 20mm strap takes a 20mm clasp.
Not compatible with the Standard Deployant Clasp, which is for our 2-piece straps.
Sizing
Sizing Two widths, each covering two lug sizes:
- 20mm — fits 19mm and 20mm lugs
- 22mm — fits 21mm and 22mm lugs
Both comfortably fit wrists from 5.75″ to 8″. Your clasp needs to match your strap width — a 20mm strap takes a 20mm clasp.
An Anchor original
Most rubber straps are variations on the same mould. This one isn't. The MonoPass™ FKM was engineered from scratch for the MonoPass system — a pass-through FKM strap designed around a deployant clasp rather than adapted to one.
At 1.5mm it disappears under the cuff. Ten micro-adjustment holes mean you land on your size rather than near it. And because the clasp keeps it a closed loop, it goes on like a bracelet rather than a strap.
Why FKM
FKM fluoroelastomer is what we build every AnchorFlex strap from, and it's why they last:
- Holds up to salt, heat, sweat, pressure and UV
- Won't crack, fade, or go brittle with age
- Micro-textured surface — none of the sticky, sweaty feel of smooth rubber
- Holds its shape where ordinary rubber softens or collapses
Specifications
- Material — AnchorFlex™ Pro FKM rubber
- Thickness — 1.5mm
- Adjustment — 10 micro-adjustment holes
- Clasp — Any MonoPass™ clasp, same lug width. Select With Clasp or Strap Only above.
- Width — Untapered; clasp width matches lug width
- Lug widths — 20mm (fits 19–20mm lugs) and 22mm (fits 21–22mm lugs)
- Fits — Wrists 5.75″–8″
Designed in Southern California. Field-tested worldwide.
