  
ROCK ZIP
This is another classic Icebreaker that will never let you down. Warm mid weight, super-soft merino with stand-up rib collar and thumb loops. The contrasting panels ensure you'll look cool, even when you're perfectly warm.
Arching shoulder and arm stripe
Low bulk
100% pure merino
Sport 320 is your mid layer for cool to freezing temperatures. It's thin and completely breathable when layered. And its low bulk makes it so easy to stow.
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