Tech Semi-Rimless Sunglasses in Light Carbon with Polarized Grey Mirror Lens. Ray-Ban Tech continues to expand on technology & innovation with the semi-rimless sport driven RB8305 Tech sunglasses. The Ray-Ban sunglasses have a top bar & a wrapped fit, crafted entirely in carbon fiber. Carbon fiber & a resin composite creates sunglasses that are lightweight, strong, & flexible with resilient material that weighs less than a ounce.