The shorts are made from a combination of yamamoto 39 scs on the front and back panels and yamamoto scs aerodome on the side panels the 39 scs material gives a softer lighter and more flexible fit whilst the aerodome aids the athlete with more buoyancy and hip rotation this is suitable in particular for the heavy legged swimmers looking to refine their technique the product concept has eight years of fantastic customer reviews behind it our buoyancy shorts have helped thousands of swim