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Utilizing advanced yarn technology, I/O Bio has created the absolute softest merino wool. In the market for next-to-skin comfort, lasting wear and superior washability? Start with I/O Bio. Their merino wool absorbs 30% of its weight in water, provides excellent thermal control and is an annually renewable, recyclable and biodegradable fiber. Why I/O Bio? Because they look out for you and the environment. I/O Bio wants you to explore, work, and relax in ultimate comfort, that's why they make superior clothing crafted with nature's best material ... Learn more about I/O Bio Merino, merino wool. Oh, and I/O Bio has you covered in the style department to, with amazingly soft and modernly designed merino wool apparel that will effortless move from one pursuit to the next. ... Less
I/O Bio Merino
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$44.95 Save 35%
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Retail $69.99 Closeouts
 
 
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Retail $89.99 Closeouts
 
 
$49.95 Save 37%
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Retail $79.99 Closeouts
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Average I/O Bio Merino Review 

(based on 146 reviews)
Read All I/O Bio Merino Reviews
  • I/O Bio Merino Signature Shirt - Merino Wool, Lightweight, Long Sleeve (For Men)
    By JoshVerified Purchaser from Maine on 04/05/2012
    Pros:
    Quality Materials, Versatile, Washes Well
    Best Uses:
    Casual, Perfect for layering, Performance
    Describe Yourself:
    Eclectic
    Length:
    Feels true to length
    Sizing:
    Feels true to size
    Sleeve Length:
    Feels true to length
    Was this a gift?:
    No
    Bottom Line:
    Yes, I would recommend this to a friend
    IO Bio makes the softest wool shirts I've owned, adn they feel like a very fine cotton with a bit more drape. I use the shirt mostly for outdoor activities, although it is comfortable enough wear out on a casual night. I can wear it over a t-shirt (also wool)and get outside down to the 30's, or just wear it alone up to 60. If I'm not active I can go warmer.
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  • I/O Bio Merino Signature Shirt - Merino Wool, Lightweight, Long Sleeve (For Men)
    By rocketVerified Purchaser from western ma on 04/02/2012
    Pros:
    Figure Flattering, Great Color, Quality Materials, Versatile, Washes Well
    Best Uses:
    Casual Wear, Wear To Work
    Describe Yourself:
    Bargain Shopper, Carpenter
    Length:
    Feels true to length
    Sizing:
    Feels true to size
    Sleeve Length:
    Feels true to length
    Was this a gift?:
    No
    Bottom Line:
    Yes, I would recommend this to a friend
    This is a great shirt. I have 3 of them now and I love them. I am tall and thin and this shirt is made for my body type. The sleeves are nice and long and there is some shirt to tuck in but not a ton of fabric. There is zero itch, it has held up to multiple washing. I do cold water and line dry. This shirt has performed excellently on me outside all day in wacky New England weather where the temp has swung from 20 to 70 in one day.
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  • I/O Bio Merino Contact 1 Crib Shirt - Long Sleeve (For Women)
    By thunder thighs 1Verified PurchaserVerified Reviewer from aims, oregon on 03/20/2012
    Pros:
    Retains Body Heat
    Cons:
    See through
    Best Uses:
    On The Mountain, Under Clothes
    Describe Yourself:
    Casual Wearer, Hikint, Outdoorsman, Snowboarder/Skier, Snowshoeing
    Was this a gift?:
    No
    Bottom Line:
    Yes, I would recommend this to a friend
    I bought this for wearing as a single layer. Alas, it is completely see-through! So, it is great for a base layer only in my humble opinion.
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