Oura announced on Wednesday that it’s launching Oura Ring 4 Ceramic, its first collection of smart rings that doesn’t feature metallic finishes. The company also announced its first-ever charging case, a new Health Panels feature that lets members schedule blood work directly in the Oura app, multi-ring support, and more.

The new Oura Ring 4 Ceramic is made from zirconia ceramic, which the company says allows for durability and lightweight comfort. Oura describes its new ceramic collection as combining “style and comfort.”

Oura says that, unlike painted or coated finishes, the color on the rings comes from natural minerals in the ceramic itself, so it stays vibrant and doesn’t fade over time.

Oura Ring 4 Ceramic comes with a Polishing Pad that can wipe off scuffs that may be caused by softer metals, like those found in cookware or dumbbells. To avoid scuffing, Oura suggests wearing the ring on your nondominant hand to avoid unnecessary impact.

The ring comes in four colors: Tide, Cloud, Petal, and Midnight. The collection is priced at $499, with membership pricing at $5.99 per month or $69.99 per year. The rings are available in sizes 4-15.