Treslite performs like a medium to light conditioner, helping to detangle, and it can also be left in. It doesn't coat hair as much as Riche, so it's typically better suited for thinner, finer hair. However, this is just a guideline, as everyone wants their hair to look and feel differently than the next person, even if they have the same hair type. The richer a conditioner, the more it can weigh hair down. Treslite has a low pH to help close the cuticle quicker without the extra conditioning which Riche has.