Sports Strap for Glasses
thingiverse
A strap for sport activities compatible with most types of glasses. The goal is to prevent the glasses from flying off while performing quick movements with head (my case: doing 360 on a bike). Works great for me its comfortable and doesnt interfere with bike helmet. You may want to do a test print and then adjust scale and make alterations accordingly. For my head and glasses it fits perfect. For a buckle I used this at 65% scale: https://www.thingiverse.com/thing:1001848Needs to be printed from TPU.
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