Water bottles are vital to keeping us hydrated outdoors- whether it’s for a day hike, a camping trip, or backpacking. We tested wide mouth Nalgenes, collapsible, glass, and vacuum insulated bottles from Yeti, Hydro Flask, and Klean Kanteen and more, comparing 17 bottles side-by-side.

We tested 50 lightweight, midweight, and heavyweight men’s and women’s base layer tops over four years. We put these base layers to work, and came out with the best base layers for warmth, durability, comfort, and ability to wick away sweat and odor over time.

We tested electrolyte powders, tablets, capsules, and drops in hot and harsh conditions such as hiking, running, and biking to bring you this list of the best electrolyte supplements on the market.