Go from a workout to a casual night out with this versatile staple. It's made of soft, breathable and durable silicone for all-day comfort. Works with Charge 6 & Charge 5 fitness trackers. With a high-quality leather strap you can achieve a classic look that fits all fashion styles. Lightweight, hand-crafted full-grain leather The leather gets its elegant color in Chicago - through traditional tanning techniques. Natural materials develop a beautiful patina over time.