I/O Merino Contact 1 LS Zip
Here's what other sites are saying:
Great as a baselayer in deep winter when you're chasing powder or alone when it's spring in the mountains and biking season begins, the I/O Bio Merino Men's Contact 1 LS Zip will keep you in all day comfort and style. With endless zip venting and moisture management properties, the I/O Bio Merino Contact 1 LS Zip for men never lets perspiration become chilling moisture and keeps you dry while you're playing hard. Versatile and lightweight, the I/O Bio Merino Contact 1 LS Zip for men is ready to perform.
- Altrec Outdoors refers to the men's version