The Avila LX Adult Snorkeling set features a mask with curved PC lens for 180-degree vision, fabric elastic strap & easy-adjust, quick release buckles. The facial skirt and snorkel mouthpiece are made with high-grade hypoallergenic silicone. The dry-top snorkel has a one-way purge valve & flex section for easy clearing & positioning. The fins are sized for Adults & have a partially detached foot pocket which reduces fatigue & allows for easier kicking.