The SINNER CUPU sunglasses provide excellent protection with polarised SINTEC® smoke lenses (Category 3) offering 100% UV protection. The lightweight and durable bio-based material frame ensures long-lasting comfort, while the polycarbonate lenses deliver clear vision. The sunglasses feature a timeless wayfarer design with an Asian fit for a perfect and comfortable fit. Nickel-free. These sunglasses are ideal for any adventurous day in the sun. SINNER Free Insurance: After registration, the sunglasses are insured for free for 1 year against theft, loss and damage.