• CFD-based fabric placement and seam construction
• Internal neck pocket for ice to keep body temperature down in hottest conditions
• Engineered ribbed fabric on sleeves and shoulders to reduce drag at race speeds, with significant savings in CdA
• Lightweight body fabric for optimal cooling, breathability, and comfort
• 2 rear pockets lie flat and prevent nutrition from bouncing around
• Castelli's Sanremo front opening makes it easier to bend for cycling and straighten out for the run and swim, while also allowing for added ventilation on extra-hot runs