Use this chart to find your size conversion.

US Size UK EU JP CM
LENGTH
7 6 39.5 25 24.4
7.5 6.5 40 25.5 24.8
8 7 40.5 26 25.4
8.5 7.5 41 26.5 25.7
9 8 42 27 26
9.5 8.5 42.5 27.5 26.7
10 9 43 28 27
10.5 9.5 44 28.5 27.3
11 10 44.5 29 27.9
11.5 10.5 45 29.5 28.3
12 11 46 30 28.6
13 12 47 31 29.4
14 13 47.5 32 30.2
15 14 48 33 31
16 15 48.5 34 31.8
17 16 49 35 32.6
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Men's UNEEK O2

$90.00

  • Fit Tip: This style is running a 1/2 size small. We suggest ordering a 1/2 size larger than your usual size!
    Size Guide
Out of stock
Please choose a size! Please choose an inseam!

Innovative two-cord construction adapts effortlessly to the foot, creating a customized fit and a free-moving feel. A lightly cushioned heel-back adds soft support, and an updated sole makes it ultralight.

  • Cleansport NXT™ for natural odor control
  • Free moving cord junctions allow for upper to adjust to foot
  • Secure fit lace capture system

We know shoes get dirty! We recommend hand washing these with cold water and a mild soap. To remove excess dirt or spot clean, use a stiff brush or soft cloth. Do not machine wash. Allow to air dry away from heat.

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Chat with a KEEN Expert for style advice and fit recommendations.

Sandal in the front, sneaker in the back.

  • Innovative two-cord construction adapts effortlessly to the foot, creating a customized fit and a free-moving feel. A lightly cushioned heel-back adds soft support, and an updated sole makes it ultralight.
  • Metatomical Footbed Design
    This internal support mechanism is anatomically engineered to provide excellent arch support and cradle the natural contours of the foot.
  • Cleansport NXT™ for natural odor control
  • Free moving cord junctions allow for upper to adjust to foot
  • Secure fit lace capture system
Material
  • Lightweight EVA midsole
  • Fully enclosed heel with soft, quick-dry lining
  • Metatomical EVA footbed
Care

We know shoes get dirty! We recommend hand washing these with cold water and a mild soap. To remove excess dirt or spot clean, use a stiff brush or soft cloth. Do not machine wash. Allow to air dry away from heat.

  • Loves it!

    5

    I bought these for my husband for Father's Day. He loves them! He's worn them every day. He says they are very comfortable, light weight, doesn't make his feet sweat. We will definitely purchase again.

    Dallas, TX

    true

    AWESOME FOOTWEAR

    5

    This is my2nd pair, extremely comfortable and very attractive

    Destin, Fla

    true

    Need 1/2 sizes beyond the 11...

    4

    I wear a size 12 shoe and you recommend ordering up a 1/2 size in this type shoe, hahaaaa, there is no 1/2 size, so I have to order the next, whole, size up. Its frustrating to see this choice but took it anyway and ordered the 13, they`re a bit too big, as you would expect, doable but not the killer fit you hope. Still like them alot and wanted to see if the 12`s would be too small and ordered a pair of those also. And as expected they`re a bit on the small size, again they`re doable but you really do need to offer the 1/2 size option for us that have a larger foot to fit than the 11,,,,, please....

    Cocoa Beach, Florida

    true

    Third pair!

    5

    These are the perfect summer casual shoe. Just a little more than the sandal. I love them.

    Harrisburg, Pa

    true

    It's a Family Affair!

    5

    My entire family is hooked on UNEEK. Purchased this pair for my older son after he tried on the pair I'd purchased for his brother. A grown man bouncing up and down saying "Oh yeah". He particularly liked this style with the sneaker in the back feature which allows him to wear like sneaker and use when biking.

    Cumming, GA

    true

    I would buy another pair, stock always seems low.

    5

    I have a pair but bought these a half size larger as recommended. It is still winter here, am looking forward to wear in warmer weather.

    MI

    true

    Very cool and stylish!

    4

    I ordered a half size larger than what I normally wear (by your suggestion), so I thought I needed to tighten the cord, but that made the sandal uncomfortable. After loosening the cord I got a loose heel. I'm hoping that will go away after break-in.

    Georgia

    true

    Great island/water shoe

    5

    This is my second pair to get. The first pair is 2 years old and I still ware them. Comfortable, durability they dry quick and plenty of air the keep your feet cool. Great product I recommend them.

    Memphis and St. Croix USVI

    true

    Most comfortable shoe I've owned

    5

    Bought my first pair the year they came out. Easily the most comfortable shoe I've ever worn. The cushioning is amazing for my 300 lb. frame. My only regret is that I live where I can only wear them five months a year.

    Great Lakes

    true

    Awesome buy

    5

    I work in the Virgin Islands. I bought these shoes for island life. 2 years and two category five hurricane's later they're still awesome. That is why I am back for another pair. My first pair I still ware daily and just want more color options. Great shoes, great products. Thanks KEENS!! Keep up the great work

    St Croix USVI

    true

    M-UNEEK-O2

    4.7 79

    95.0