This is the stronger version of my NATO strap adapter for the Fitbit Air! It is still slim and comfortable on the wrist, but it has stronger strap slots.

It also prints completely support-free!

I optimized the geometry so you can print it flat on the bed without dealing with messy support removal, saving you time and material while leaving a much cleaner finish. It still prints beautifully in PLA and offers a highly personalized, comfortable (especially the 20mm version), and budget-friendly alternative to Google's official straps.