S/Lab Ultra 10Designed to surpass even the highest product performance standards in ultra running, S LAB ULTRA 10 is so lightweight and comfortable youll forget it's there. Inspired and created by Franois dHaene, its our lightest ULTRA specific vest and has numerous easy to access storage pockets for all your essentials and high volume hydration flasks. Built to feel like an extension of yourself with a seamless, precise fit thanks to lightweight materials, an