PC lens: Safe/Lightweight/UV Protect 

Nylon (PA12) lens: Nylon (PA or PA12) has excellence optical quality(Only after glass and CR39) and it’s high elasticity will absorb shock. A hard coating is already included as a step in production so it has good anti-scratch quality as well.  

Tritan lens: Clear, BPA Free, suitable for acetate frame and good chemical resistance.