Check the listing for details. IST Flexible Foldable 100% Silicone Non-Purging Snorkel. Condition: New with tags. Listed at 22.95 USD. The IST SN36 Flexible Foldable 100% Silicone Non-Purging Snorkel is designed specifically for deep spearfishing and freediving, but makes a versatile and practical addition to any diver’s gear.100% top grade silicone construction: a snorkel you can fold up for compact storageGreat to tuck into a BCD pocket for tech redundancy or use as a spare snorkelAnatomically-shaped, hypoallergenic mouthpiece for a comfortable fitMouthpiece includes bite tabs and s-angle shape to eliminate jaw fatigue, ensure easy breathingClassic, proven, no-nonsense designThe durable tube is bendable, to flex against solid objects and then spring back into its original shape and position. You can fold and bend this snorkel—and even tie it into a knot! —for compact storage. This makes the SN36 an ideal choice for use as a spare snorkel that’s easy to store and carry, and easily fits in a BC pocket when folded. A comfortable, hypoallergenic silicone mouthpiece in a special anatomical shape includes bite tabs for the best seal, making the snorkel easy to grip while eliminating jaw fatigue for easier breathing and prolonged usage. The gently curved, s-angle of the mouthpiece allows air to flow freely and users to breathe easily with relaxed jaw muscles.