Barbed or “cog” PDO threads provide a mechanical lift, while smooth “mono” threads focus on skin quality, texture
https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1161193
Barbed or “cog” PDO threads provide a mechanical lift, while smooth “mono” threads focus on skin quality, texture, and fine-line improvement.