Casio has revisited one of its most recognizable digital watches with the F-91WF, a new variation of the long-running F-91W that swaps the familiar resin strap for a cloth band made with recycled PET fibers.
The change is deliberately modest. Rather than turning the F-91W into something more complicated, Casio has kept the same basic formula that made the watch popular in the first place: a small digital display, simple timekeeping features, very low weight and a battery that can last for years.
The F-91WF is available in three versions, the F-91WF-1A, F-91WF-2A and F-91WF-3A, with the main difference coming down to colour and styling. The watch measures 38.2 x 35.2 x 8.5mm and weighs just 21 grams, matching the classic resin-band model despite the material change.
Functionally, there are few surprises. Casio includes a 1/100-second stopwatch, daily alarm, hourly signal, 12- and 24-hour time formats, calendar, day and date display, and a green LED light. Accuracy is rated at plus or minus 30 seconds per month.
The appeal is less about what the F-91WF can do and more about what it deliberately avoids. There is no Bluetooth, app, account, charging routine or stream of notifications. For buyers who want a basic digital watch rather than another connected device, that simplicity remains the F-91 family’s strongest argument.
The new strap could also make a meaningful difference in daily wear. Casio says the recycled PET cloth is lightweight and designed to resist scratches and stains, although those durability claims will be easier to judge after longer-term use. What is immediately clear is that the band gives the familiar watch a softer and more casual appearance than the traditional resin version.
Battery life remains another major advantage. Casio rates the CR2016 cell for around seven years, putting the F-91WF in a completely different category from smartwatches that need charging every few days or, in some cases, every night.
Water resistance is more limited. Casio lists the F-91WF as water resistant rather than giving it a 5-bar or 10-bar rating, so it is better suited to rain and everyday splashes than swimming or watersports.
Pricing is listed at around ฿1,600 in Thailand, roughly $48, which makes this a noticeably more expensive take on a famously affordable watch. That may be the biggest question for buyers, particularly when standard F-91W models remain widely available for less.
Still, the F-91WF is not really trying to replace the original. It is a material and comfort-focused variation for people who already like the F-91W’s minimalist approach but want something different on the wrist.
