HIONA sunglasses have flexible, flexible frames made of Grilamid TR90. The lenses have a UV 400 filter that protects against harmful radiation. Lenses made of polycarbonate are more resistant to damage and scratches. The glasses are polarized to reduce glare. The multi-layer REVO coating improves color vision and increases contrast. The included hard case will protect the glasses against scratching or damage. The set includes a hard case for storage and transport.