Mono threads are made from a material called Polydioxanone (an absorbable suture material) and inserted into the skin to induce collagen synthesis for skin tightening and lifting. Great for all areas and will not replace filler and anti-wrinkle but compliment these treatments. The body will fully absorb the material over a matter of weeks but the tightening and lifting effects can be seen for 6-12 months because of the extra collagen production.