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We all have one lurking in our closets—a sport bra that might seem all right when you pull it out, but starts stinking of an accumulation of last season’s workouts when you get active. The I/O Bio Women’s Contact Top won’t pull this trick on you, thanks to the natural anti-odor properties of the top’s soft merino wool. This natural fabric pulls moisture away from your skin as you sweat, while temperature-regulating properties make sure you don’t feel too hot or cold. A touch of elastane provides great fit and support as you go for a personal best in your next race or take on a challenging bump run.

  • Offers medium- impact support for A and B cups, and low-impact support for C+ cups
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Great cut, flattering bra, very soft

    I ordered two of these bras, one blue, one black, for an upcoming backpacking trip in the Himalayas. I am a 34C or 36B depending on brands, I ordered the Large and they fit great! The material is soft and stretchy, the seams are well placed for shaping and to avoid chaffing. I would say this bra is good for medium to high impact sports for A to B cups and medium to low impact for C cup. If I get cold, the material doesn't prevent nipple show through completely, but it is minimized a little.

    No more XS?

      I have a couple of these bras -- black with green lining and light pink with green lining. They are awesome. Perfect comfort and support for backpacking (32 B-ish) or traveling. Not like an elastic bandage. Much less compression than the synthetic/lycra bras I like to run in. I bought the XS. I noticed that there is no XS in most of the colors. Have they changed their sizing or is the XS just sold out?