The Orca snorkel is a basic swim training accessory. It can be adjusted for a perfect fit so that you can focus on improving your technique, whilst breathing continuously under water. You can expel any water that might get into the tube whilst swimming through the blow valve. Improve your technique and performance in the water. MATERIAL 90% PVC 10% liquid silicone. Head Band: 80% polypropylene, 20% TPE. COMFORT The forehead support as well as the silicone straps can be adjusted to fit perfectly. VISIBILITY The neon orange colour makes you visible to other swimmers.