ESPA’s Optimal Pro and To Go Duo is a serum pair designed to target uneven texture and dehydration with a fast-absorbing, silky-gel feel. Ideal for normal to combination skin and travel-ready routines, the duo balances daily active support with lightweight hydration. Fragrance-free and formulated for layering under moisturizers, it suits users seeking professional-strength serums without heavy residue.
Ingredient Safety
Low risk29
Moderate risk6