Icebreaker GT Run Ace Crewe - Short-Sleeve - Men's - $29.98

Ditch your ratty-old cotton running tee; the Icebreaker Men's GT Run Ace Crewe is going to blow your mind with its stretchy Lycra and natural merino wool. In case you haven't learned who's the boss in terms of layering these days, it's the sheep, and sheep who provide merino wool specifically. Icebreaker used merino wool to create this itch-free running top that not only breathes like a champ but also provides a touch of warmth when the weather turns brisk. Eyelet panels provide an additional measure of breath-ability (as if you needed it), and to keep things modern, a back stash pocket holds a MP3 player, and a loop at the neck manages your earphone cord. Pull on this athletic-fit top and drop the hammer on a training run in the mountains'the sheep will be impressed. - $29.98