XPL Thin & Light VOLO Black Gradient BOMBER Eyeglasses 51/20 。The Volo collection is inspired by the weightlessness and strength that defined the aviation movement. Each frame was created with the intent of being classic and timeless with modern twists and fine details.The entire Volo collection is crafted from handmade UTX acetate, a material 40% lighter than regular acetate. The design team has been attentive to every detail of the frame with proper fit and comfort at the forefront of design. Each frame has a V-bevel so that it holds the prescription lens extremely well, with the same retention as a traditional acetate frame.Drawing inspiration from aviation and the sky, the entire VOLO collection naturally gravitated towards translucent blues, gradient crystals, and similar colors with a light and airy feel.