Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, stimulating...

https://israelsinspiringchat.lumenforgex.com/posts/if-i-have-significant-sagging-is-non-surgical-tightening-a-waste

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, stimulating collagen deep under the skin for gradual tightening. It’s known for visible improvements over 3 to 6 months