Alder full mask * 180-Degree view * Built-in snorkel * With GoPro mount * Easy to secure * Alder branding * Colour: Green The Alder Avance Full-Face mask offers a panoramic view of the ocean when snorkelling. The full face mask attaches securely to your face using four straps that wrap around your back. The snorkel is fully integrated so it will not slip from your mouth and won’t get lost underwater. This is especially useful if you don’t like the feeling of a traditional snorkel.