What is Teosyal Puresense Redensity 1?

One of my favourite skin boosters to use in Face Clinic is Teosyal Puresense Redensity 1 But, what is Teosyal Puresense Redensity 1?
One of my favourite skin boosters to use in Face Clinic is Teosyal Puresense Redensity 1 But, what is Teosyal Puresense Redensity 1?