Strap Guide: Seiko Prospex SRPL15

Strap Guide written by @watcheswithchiri. Thank you, Gerardo!

Introduction

The Seiko Prospex SRPL15, in my humble opinion, truly has it all. To my eyes, it’s a refined evolution of the classic ‘Samurai’ — now more versatile than ever, thanks to its mix of black tones and the way it plays with light. While it measures a hair under 42mm, it wears closer to 40mm, making it a great fit for almost any wrist. This Seiko is a true sports watch, offering bold, angular finishing and 200m of water resistance — even for those of us who have no business diving that deep. And the cherry on top? It’s an absolute strap monster. Everything looks good on it! The only question is: Which vibes do you have in mind?

Olive Green Tropical Rubber CTS

The Olive Green Tropical Rubber CTS strap brings out the sportier, more expressive side of the SRPL15. Its earthy tone and textured finish give the watch a rugged, field-ready vibe, while still feeling warm and approachable. The yellow accents on the hour markers co-exist beautifully with the olive green strap, creating a colour harmony that feels intentional without trying too hard. Perfect when worn with autumn tones or neutral layers, this combo stands out quietly; it's the kind of strap that elevates your outfit without overpowering it.

Navy Mosaic Rubber CTS

A true game changer, the Navy Mosaic Rubber CTS strap is one of those unexpected combinations that just works. At first glance, the contrast between the strap’s eye-catching mosaic texture and the clean, angular case of the SRPL15 might seem a little too much. But once on the wrist, it’s the perfect storm: striking, modern and full of personality. The blue tone plays with light in a way few straps can, turning heads without ever feeling over the top. Pair it with monochromatic outfits or grayscale tones, and let the strap do the talking. Sporty, elevated and utterly unique.

White Sailcloth Signature

If you're looking to give your SRPL15 a tougher edge without sacrificing its personality, the White Sailcloth Signature strap might be your best move. Built to handle any environment, this strap is rugged yet comfortable, staying secure on the wrist throughout virtually anything. The crisp white texture creates a bold contrast against the watch’s deep blacks, while maintaining its sporty, sophisticated character. Let’s be honest, black and white rarely misses the mark. This combo feels clean, modern and ready for anything, no matter the outfit or setting.

Black Waffle Rubber CTS

Give your SRPL15 a subtle but noticeable twist with the Black Waffle Rubber CTS strap. It’s a fun, textural upgrade that adds instant depth and personality — the perfect alternative to the OEM silicone strap. Its matte black tone blends seamlessly with the case, while the waffle pattern adds visual interest to the dial’s otherwise monotonous aesthetic. Pair it with the matching Graphite titanium clasp and thank me later.

Cognac Shell Cordovan Slim

Elevating your SRPL15 into smart casual territory is as simple a matter of pairing it with a leather strap. In this respect, it’s hard to deny the appeal of the Cognac Shell Cordovan Slim strap. This piece adds just the right mix of elegance and edge, giving the watch a more polished, everyday-ready feel. It tones down the tool-watch attitude and transforms the SRPL15 into a legitimate contender for the office or any night out.

Wine Red Rubberised Leather (Smooth) Slim

The Wine Red Rubberised Leather (Smooth) Slim strap brings a bold and unexpected twist to the SRPL15. Its deep burgundy tone is eye-catching without being loud, with just the right amount of contrast to make the watch stand out with style. The material itself is impressively light and durable on the wrist, making it ideal for all-day wear. It pairs effortlessly with the watch’s black case and cream hour markers, creating a look that’s both refined and edgy. For those casual weekends out when you want your watch to lead the conversation, this strap delivers comfort, character, and confidence in one sexy package.