Not easy to define.
BIO PLASTIC FRAME / POLYCARBONATE LENS
ECO TRU BIO Plastic
Polycarbonate, 6 base lens. 100% UVA/UVB protection.
Good for bright to overcast days providing slightly more contrast and warmer tones
Includes Microfiber Sunglass Bag
12 Month Limited Warranty
50h - 146w -140l (Large Sized Frame)
26 grams
Made in China
NYLON/POLYCARB