Castelli Men's Free Sanremo Sleeveless Tri Suit SpeedFreak ventilated race fabric on front of upper portion - Velocity mesh back gives wind-tunnel proven speed on the bike Full length zipper - FreeAero 2 hydro- and aero-optimized pockets Soft-finish armholes to reduce chafing - Castelli-innovated Sanremo front construction allows easy nature breaks and ventilation in a one-piece race suit Giro Air leg gripper elastic KISS Tri seat pad is comfortable on the bike and virtually disappears on the run - Multi density foam specifically designed for the triathlete, optimized for aerobar position on the bike with a seamless skin care layer, super soft, brushed microfiber top that maximizes comfort and fit - Bacteriostatic treatment to avoid saddle sores and infection