Take your swim training to the next level with the Ultralite Snorkel Airflow Restrictor Set. The LRESCAP snorkel restrictor caps restrict airflow by 60% and 30% in order to effectively increase swimmers’ lung capacities. The two-piece set comes in bright yellow and orange, so you can easily differentiate between the caps. Train hard, train smart with the Ultralite Snorkel Airflow Restrictor Set! Compatible with the TYR Ultralight Snorkel.