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.
Customers praised this single-pass FKM rubber watch strap for its "excellent quality," comfort, and low-profile design. Many noted it's "super thin," flexible, and doesn't absorb water like nylon. The deployant clasp received mostly positive feedback for convenience, though some found it less comfortable or "klunky" with sharp edges.
Some of the reviews shown are from related products the merchant grouped with this one.
R
Love this band. Love the adjustable fit and love the matte black hardware.
K
PERFECT
C
I am loving this band. I find myself changing it out on most of watches I wear because it looks so good. Stays tight and feels right. If you're on the fence about this band. Just do it. You will be happy you did.
D
These really punch up, impressed with the strap and hardware, very nice
M
I put the AnchorFlex on my Tudor FXD GMT as soon as the strap arrived. It looks and feels amazing. I upgraded to the precision deployant and am extremely pleased with it. It fits great and feels very strong / secure. The only issue.....what color to order next!?
K
Not only is this comfortable but a must for any watch owner for inside the office and out
R
I have only had this strap for just a few hours and I can already say that this is my most favorite FKM strap I have bought. The green is the perfect shade, the clap is immaculate and adds a touch of class to the strap. Overall build quality is fantastic.
w
FKM rubber 1 piece nato w/ deployant clasp....Genius #teamwristporn
P
Honestly the best rubber strap ever made, IMHO!
I’ve tried all sorts of rubber straps from Everest to Isofrane to Tropic and Rubber B. Despite the best efforts, they are all stiff and do not articulate around the wrist, which causes the watch head to slip off the center of my wrist and cant to one side.
For these reasons I like to wear pass-through nylon straps, they allow the watch to sit flat and they articulate easily around the wrist. However, double pass straps elevate the watch off the wrist making it wear larger than it would with a two-piece strap. Pass-through straps also have that extra tail that needs to be tucked away and adds to the bulk. Additionally, the typical nylon pass-through straps absorb water, so anytime I’m washing my hands thoroughly, I end up with a wet watch strap for a while afterwards. And finally, pass-through strap are not as quick and easy to strap on and off as a bracelet with a folding clasp.
ENTER: The FKM single-pass deployant strap! WOW! Super easy to set it and forget it, sits low and flat on the wrist and doesn’t have the big tail to tuck away. Doesn’t absorb water and it works on fixed-lug watches! It turned my CWC Ti300 into a super easy grab and go everyday watch. Also, it is easy to buy one clasp and swap from one color to the next.
I found out about this from Jason Heaton on TGN. I love these so much I’ve bought multiple colors and even ordered their single pass nylon deployant in OD Green.
Great design, wonderful product. I finally have found a solid strap that I can recommend to others. Worth every penny.
V
Love these strap, already have three and the fkm rubber is insanely comfortable! Had a small issue with the clasp, Alex responded right away and is working to get a new class shipped out to me. In the meantime, easy swap to put the strap on one of my other anchor clasp. Picking up another today!
H
The strap feels high quality and the buckle is nice but not as nice as high end buckles. The fabric is thin and robust at the same time. Overall it's good and looks slick on my FXD Alinghi. I think I like it.
B
Anchor’s deployant rubber single nato is exactly what I was looking for to replace my OEM strap on the Pelagos FXD. Hardware is sturdy and brushed look compliments the case well.
V
Excellent quality, fit & finish as always! Almost exclusively grab the numerous anchor straps I have for my collection. Glad to be adding this one to the rotation. Especially because it’s for a great cause.
L
This strap is not only a beautiful colour, but also made from a soft, comfortable rubber. The clasp design is sturdy and easy to change the size for my very small wrists. I will definitely order other colours!
K
This was a fun holiday-themed replacement strap for my Ball Engineer Marvelight III. This watch is my daily driver, with a beautiful green face so I decided to deck the halls and go full Christmas colors. In loving the combination so far and the deployment clasp style fits my preference. My only complaint is the thickness/weight of strap feels a smidge too light/thick. This is a nitpick, and overall I’m extremely satisfied with this product.
S
Let me start by saying that I was so pleased to purchase this strap, just to support such a wonderful cause, and I will strongly award five stars on general principle right there. Bravo AnchorStraps!
The strap itself, therefore, was a secondary consideration and I didn't buy it because I actually wanted it per se. I did find it to be slightly on the thin side, although it wears fine nonetheless. And although $45 for a deployant clasp is much cheaper than those from other strap companies, I felt the cost savings were there to see and feel.
Overall, though, a great campaign in support of one of the greatest causes there is.
V
The strap is amazing. Better than I expected even. However, the clasp was a bit of a let down. Not a dealbreaker but could be better.
B
This is the second time I purchased this strap, this time in pink. Goes really well with my Tudor BB 925. Look forward to seeing new products from Anchor Straps.
E
Amazing strap for an amazing cause. I have the 20mm also. All for her, and for everyone else. Thank you, hope this series continues.
A
Very nice strap! I had doubts that FKM rubber would be pliable enough for a full pass. To the contrary, the strap is quite flexible and looks better than a NATO (which everyone has). The clasp is OK, a little sharp on the edges, but is very secure and easy on/off. I plan on ordering another in 22mm.
