The Carbon Ultra is designed to give you maximum compression and maximum comfort. While high level compression tends to be more popular with sprinters, the zoned compression of Carbon Ultra makes this a favorite of1500 m Gold Medalist Gregorio Paltrinieri. Most swimmers find the ideal fit to be one size up from your practice suit size. In addition to utilizing POWERSKIN Intelligent Compression and Power Return Construction technologies the Carbon Ultra introduces new features designed to optimize your performance including: INFINITY LOOP. ULTRA COMPRESSION PANELS. CARBON ULTRA CAGE.