This is the XS Scuba Oceanways AquaPro Fins Full Foot Snorkeling Fin Junior and Adult Features: Full-foot rubber fins provide unsurpassed comfort and efficiency Less ankle fatigue Greater propulsion These are the most popular type of fins for snorkeling, swim training and rental departments Ideal-fitting foot pocket Made in the USA Oceanways time tested rubber full foot fins have long been a popular snorkeling, scuba and lap swimmer fin. Made of flexible non marking rubber for less ankle fatigue and true propulsion. Made in the USA. Youth and Adult sizes available. Adult sizes are in Mens shoe sizes.