REI Co-op Polartec Power Stretch Running

Running is more comfortable with the right clothing. This article highlights fabrics and features for warm weather and winter running.

Synthetic or merino wool socks have subtle differences depending on their intended activity. We'll explain sock fit, features and fabrics.

Discover our list of the 6 best gaiters at the co-op, including over-the-ankle options and knee-high options for hiking, running and mountaineering.

Gaiters come in different shapes and sizes. Learn how to choose and use gaiters for hiking, mountaineering and trail running.

Which hydration pack is best? Learn about reservoir size, gear capacity and other key pack features for cyclists, runners, hikers and more.