The result of collaboration with ultra runner Scott Jurek, the Ultimate Direction SJ Ultra Vest offers the best weight-to-capacity ratio of any hydration pack on the marketweighing a featherlight 7.5 ounces (13 with bottles) and offering 9.2 L of storage space for apparel, accessories and essentials. The SJ Ultra Vest packs dual 20 oz bottles in front for quick access to help keep you hydrated on the trails.
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