Divecore - HNBR Rubber - WFL Professional Diving Watch Strap - For Apple Watch - Black
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Find Your Strap Size Here
Finding the perfect strap or accessory for your watch can greatly enhance comfort and style. Our sizing guides help you measure your watch accurately, ensuring the best fit. Whether you have a traditional watch or an Apple Watch, we provide step-by-step instructions to determine the ideal strap size and watch lug width. With these guides, you can confidently choose the perfect straps and accessories to enhance your watch.
• Traditional Watch Instructions:
1) Open Our Sizing Guide Here. Download Here
2) Print File. In print options dialogue box, uncheck any “shrink oversized pages to fit” or “fit to page” boxes. *IMPORTANT!*
3) After printing, test the accuracy by measuring the “one inch” test strip with a standard ruler.
4) Cut off the inch ruler from the side and wrap around your wrist to determine your wrist size.
5) Hold your watch with the lugs framing the blocks below to determine your lug width. There should be no gap or overlap.
Lug Width Measurement:
To determine your lug width, print the BluShark Watch Sizing Guide in step-1 and place your watch on the measuring blocks located on the bottom of the guide.
• Apple Watch Instructions
1) Open Our Apple Watch Sizing Guide Here. Download Here
2) Print File. In print options dialogue box, uncheck any “shrink oversized pages to fit” or “fit to page” boxes. *IMPORTANT!*
3) Cut out the tool. Position the wider end where you would wear a watch. For a more accurate measurement, you can use a piece of tape to hold the wider end in place.
4) Wrap the tool around your wrist, keeping it in place. Make sure the tool feels snug and doesn’t slide up or down.
5) Note the inch number the arrows point to – that’s your band size.
6) If the arrows land between two measurements, choose the smaller of the two numbers closest to the line.
Adapter Measurement:
To determine which size adapter you need, use the following guide:
If your Apple Watch is 42mm, 44mm, or 45mm, you’ll need an adapter that measures 22mm.
If your Apple Watch is 38mm or 40mm, you’ll need an adapter that measures 20mm.
If you have a 41mm Apple Watch, choose the 20mm adapter.
- In stock, ready to ship
Divecore WFL Strap for the Apple Watch — A Modern Waffle with Proven Performance.
The WFL Strap is the latest purpose-built diving band from Divecore, blending the vintage character of a traditional waffle design with the technical upgrades and proven ergonomics of the HP model. Crafted from an upgraded Hydrogenated Nitrile Butadiene Rubber (HNBR) compound, the WFL delivers a high-performance feel comparable to FKM, but with superior tensile strength, tear resistance, and extreme low-temperature flexibility.
Designed to thrive in harsh marine environments, the HNBR material offers exceptional resistance to saltwater, wet heat, and compression. The WFL retains all the essential features of the original HP series while adopting a classic waffle-style structure and a micro-adjustment system for unparalleled sizing precision.
Hydrogenated Nitrile Butadiene Rubber (HNBR) is a premium, high-durability elastomer engineered to withstand extreme physical and environmental demands. Known for its exceptional tensile strength and tear resistance, HNBR outperforms standard FKM in pure physical toughness, making it highly resilient against cuts and abrasions. Because its molecular structure is stabilized through hydrogenation, it offers outstanding long-term elastic recovery and maintains flexibility in extreme cold down to -40 °C. Combined with its unparalleled resistance to saltwater, steam, and wet heat, HNBR is an ideal material for high-performance diving straps designed to endure harsh marine environments without compromising on comfort or structural integrity.
• HNBR Rubber
• Measures: 82mm & 128mm
• Thickness: 4mm
• Premium Brushed or DLC Black Stainless Steel Hardware
• Adjustable Locking Rubber Keepers
• Fits Wrists: 6.5" to 8.5" Keep in mind that the fit may vary based on your preference for a tighter or looser wear.
Apple Watch Sizing:
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Small Size: Fits Apple Watches: (38mm, 40mm, 41mm)
Series 10 42mm, Series 11 42mm, Series SE 3 40mm
(20mm band width)
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Large Size: Fits Apple Watches: (42mm, 44mm, 45mm, 46mm)
Series 10 46mm, Series 11 46mm, Series SE 3 44mm
(22mm band width)
- Shop this strap for the Apple Watch ULTRA.
Things To Know:These straps have extra material around the spring bar (approx. 3.2mm from the pin of the spring bar vs. the typical 2.4mm), which may cause a tight fit with a few select watches. Free, easy returns available if it’s not the perfect fit.
Note:DiveCore watch straps are not eligible as the free strap in our Buy 2 Get 1 Free promotion, but they do count toward earning a free strap. If you buy two DiveCore straps, you’ll still get a free strap from the eligible options (excluding Horween Leather & DiveCore).