TL;DR
This roundup spotlights flexible 3D-printing filaments that aren’t your usual TPU, from PEBA and Foam TPU Air to glass-filled PBT, polypropylene, 72D TPU and even the sporty Timemass Active. You’ll also find a free 3D-printing eBook link, plus affiliate-disclaimer notes and a shout-out to the Maker’s Muse community.
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