Tom Ford LindaLinda's butterfly shape is ultra-feminine. It's hand crafted from burnt tortoise acetate, exclusive to Tom Ford. Tubular metal pierces the frame front as tortoise acetate continues on. But metal reappears with the Tom Ford plaque inlaid at the tips. The Tom Ford logo is also seen at the lens. This ensures Linda's authenticity. UV400 lenses. Tom Ford sunglasses come with a two year warranty.