Design Philosophy The Women\'s FS260-Pro Jetstream L/S Jersey II includes all of the great features of it\'s hugely succesful predecessor, but benefits from a cleaner, more contemporary design. Windproof Protection The secret behind this jersey is the carefully thought out fabric placement. The front panels provide excellent wind and water resistance as well as providing insulation for your core, whilst the back panels utilise a more breathable yet insulated fabric, keeping you dry and hence warm.