INDIGO
Indigo is made out of Vintage brown bamboo. Features TAC polarized lenses and stainless steel spring hinges.Atwood highlights: Handcrafted from sustainably sourced wood Brown bamoo frame TAC...
Glacier - Woodey™ - Ebony black wood sunglasses featuring TAC Ice Blue polarized lens and stainless steel spring hinges. (frame:141mm; lens:50mm)
Triacetate Cellulose is a new technology used first in the military. TAC Lenses not just polarized but they provide more clearer view than your normal lens.
TAC Polarized lenses are manufactured with a 7 layer construction: