Shine on in Ray-Ban RB4179 Liteforce sunglasses for men, constructed with the latest advancements in durable plastics. These shades are made with Liteforce, a high-tech thermoplastic material that gives you a lightweight yet sturdy frame. The thin frames, rectangular lenses, and slightly rounded top bar provide definition that flatters round and oval faces. The temples are thin, with curved temple tips that hug your face so your frames stay in place no matter how much fun you're having.