Field Test: Mountain running guarantees encounters with nasty weather, so I overpack. This 18.8-ounce, 11-liter vest delivers high capacity without a weight penalty. I fill the 2-liter reservoir; stash layers; clip on trekking poles, and stow food and maps. Front pockets keep phone, electrolytes, extra water, and gels within reach.
Why It’s Timeless: Cinch the external bungee for a streamlined approach. $140; nathansports.com —Olivia Dwyer
From the Early Summer 2015 issue.