This is the C4 Mistral Freediving Spearfishing Snorkel All Color Options Features: Specifically designed for freediving and spearfishing Anatomical bite in non-allergenic silicone The central part of the tube is made in semi-rigid thermoplastic Upper past of the tube is made in a softer, more flexible material Make it a set with the C4 Plasma Mask Mistral is a snorkel specifically designed for freediving and spearfishing. It features an anatomical bite in non-allergenic silicone for long use. The tube is molded in two different materials with a different hardness. The central part of the tube is made in semi-rigid thermoplastic and the upper part of the snorkel is made in a softer more flexible material.