Dark Tortoise Plant Based Polarized Square Frame Sunglasses

Dark Tortoise takes the most enduring pattern in eyewear and pushes it toward midnight. Deep, nearly black bio-acetate carries flashes of amber and ember red that surface along the temples and catch the light as you move, so the frame reads dark and polished from a distance and reveals its fire up close.

A fine gold line traces the inside of each lens rim, adding a quiet glint of metal to the bold square silhouette. Dark smoke TAC polarized lenses keep the look sleek and the glare under control.

The Pattern

Tortoise has been a mark of considered taste in eyewear for generations, and the dark version is its most refined expression. The pattern runs through the acetate itself, so the placement of every amber fleck shifts from frame to frame and each pair is entirely its own.

When to Wear It

Dark Tortoise is the everyday frame of the collection, moving from a weekday commute to a dinner reservation and pairing as easily with denim and a white tee as with a navy suit.

Lens Details

• TAC polarized lenses in dark smoke
• Cuts reflected glare from water, pavement, and glass
• Full UV400 protection against UVA and UVB rays

Frame Details

• Plant-based bio-acetate made from renewable wood pulp and cotton fibers
• Deep tortoise pattern with amber and ember flecks, polished to a high gloss
• Gold-lined lens rims
• Premium hinges for a firm, balanced fit
• Bold square silhouette, one size fits all

In the Box

Every pair arrives in the signature orange Ison Couture presentation box with our Lens Care Kit included free: a 2 fl oz bottle of Ison Couture lens cleaner, a microfiber cleaning cloth and a branded microfiber travel pouch. One bottle is good for hundreds of cleanings.

Explore the full Plant Based Polarized Collection.