Dual Slider Buckle for EyeSeal Mask head strap

If you suffer from nocturnal lagopthalmos and use the EyeSeal mask to keep your eyes moist while sleeping, you might have found the factory cloth head strap to be less than ideal.

I made myself a better head strap using 1/2" sewing elastic and two slider buckles that I printed in TPU. The photo shows the head strap assembled.

Print them with 100% infill. Materials other than TPU would probably work fine. TPU just happened to mimic the flexibility of the two single slider buckles that