Think back to your first runs, when you still huffed and puffed through a 5K, glancing at your watch every minute and wishing it would stop. You鈥檇 reach down and touch your shirt鈥攕oft, a little damp, and almost certainly made of cotton. These days low-tech, plain-Jane cotton is something of a has-been, replaced by newfangled synthetics and resurgent natural fibers like merino. But despite cotton鈥檚 drawbacks, there鈥檚 still a lot to love.

Patagonia Flying Fish Organic Cotton ($35)
Some of our favorites, like Patagonia鈥檚 Flying Fish Organic Cotton, are as simple as running itself. It鈥檚 printed with quirky, beautiful, outdoors-inspired graphics.

American Giant Premium V-Neck ($37)
If blending in is more your speed, the soft-touch, made-in-the-USA American Giant Premium V-Neck is a solid option. Its heavier fabric, double-stitched neckline, and reinforced seams help it stand up to long miles of abuse, and it won鈥檛 snag during scratchy off-trail 鈥渟hortcuts.鈥
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Jockey Classic ($49 for six)
The budget minded can always pick up a six-pack of diamond white Jockey Classic for a week鈥檚 worth of laundry-free training.

Ably Apparel听Tourist ($48)
Despite poly-preferring naysayers, cotton plays well with other ingredients. Ably Apparel鈥檚 Tourist is infused with proprietary tech to repel liquid and resist stink without sacrificing softness or breathability.

Ten Thousand Essential ($48)
And the Ten Thousand Essential incorporates Polygiene to crush odor and has breezy, laser-cut holes in the armpits.