Leather vs Rubber: Crown and Buckle Cordovan or ZULUDIVER FKM?

This is leather versus rubber for two different watches. The Crown and Buckle Shell Cordovan is a dress strap for formal and office wear that patinas over time. The ZULUDIVER FKM Rubber is a ventilated dive strap built to survive salt water, sweat, and temperature extremes. The right pick depends entirely on whether the watch gets dressed up or gets wet.

At a glance

Spec	Crown and Buckle Shell Cordovan Leather Strap Check price on Amazon	ZULUDIVER FKM Rubber Dive Strap Check price on Amazon
Price	$65-$90	$38-$52
Our rating	4.9 / 5	4.7 / 5
Best for	Dress watches, formal occasions, collectors who want a strap that improves with age	Dive watches, bezel sport watches, ocean or pool use where a strap must survive submersion regularly
Material	Horween Shell Cordovan	FKM fluoroelastomer rubber
Best use	Dress and formal	Diving and water sports
Water	Keep it dry	Built for submersion

The two options in depth

4.9

Crown and Buckle Shell Cordovan Leather Strap

A dress strap cut from Horween Shell Cordovan, the most prized saddlery leather in watchmaking. Hand-finished edges, a silky smooth inner lining, and a taper from 20mm to 18mm. Built to develop a deep patina over years of wear.

Best for Dress watches, formal occasions, collectors who want a strap that improves with age

Horween Shell Cordovan is the benchmark for dress strap materialsHand-burnished edges and a quality leather liningDevelops a rich, unique patina over years of wear Premium price not justified for casual or sport use

$65-$90 Check price on Amazon

4.7

ZULUDIVER FKM Rubber Dive Strap

A fluoroelastomer rubber strap made for dive watches, with a curved end profile for popular sport watch lug shapes, a signed stainless tang buckle, and a ventilated design for underwater comfort.

Best for Dive watches, bezel sport watches, ocean or pool use where a strap must survive submersion regularly

FKM rubber resists oil, UV, salt water, and temperature extremesVentilated design reduces suction and water trapping during divingCurved end profile fits most sport watch lug shapes FKM is firmer than silicone, which takes a few days to soften on the wrist

$38-$52 Check price on Amazon

Which should you buy?

Buy the Crown and Buckle Shell Cordovan if your watch lives at the office or at formal occasions and you want a strap that ages beautifully. Buy the ZULUDIVER FKM Rubber if the watch goes in the pool or ocean and needs to survive regular submersion. Leather and water do not mix, and a rubber strap looks out of place under a suit, so most collectors keep both and swap by occasion.

Common questions

Can I wear the leather strap swimming?

No. Shell cordovan and any leather strap should be kept dry. Repeated water exposure dries and cracks the leather. For pool or ocean use, the ZULUDIVER FKM rubber strap is the correct choice.

Is FKM rubber better than silicone for diving?

Yes. FKM fluoroelastomer resists oils, UV, salt water, and temperature extremes better than standard silicone, which is why ZULUDIVER uses it for dive straps.

Should I just own both?

For a versatile watch, many collectors do exactly that, swapping the Cordovan for formal wear and the FKM rubber for water and active use. Each strap plays poorly at the other's job.