Style: 10-616
The I/O Bio Merino Long Sleeve Zip is our interpretation of the enduring Zip-T. But since we pride ourselves on versatility in our "Inside/Outside-You Decide" style….We factored a slightly longer back, next to skin fit, endless zip venting, and thumb loops. So, whether you left them in your cold smoke wake or are dusting off from an untimely yardsale, you'll be feeling AND looking good inside and out.
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