Say hello to supreme energy return. We remade our high-energy running shoes with a 360º fit improvement to support female runners.




Say hello to supreme energy return. We remade our high-energy running shoes with a 360º fit improvement to support female runners. The Ultraboost 22 has a narrower heel fit and lower instep curve to reduce heel slippage and help avoid blisters, plus the medial outsole pattern has been refined for a smoother ride. Throw in the foot-hugging adidas PRIMEKNIT and incredible energy return of BOOST, and you get an ultra-comfortable shoe for any distance.

Product Features:

  • Regular fit
  • Lace closure
  • Primeknit
  • Stable, supportive feel
  • Textile lining
  • Boost midsoleMidsole drop: 8 mm (heel: 21 mm / forefoot: 13 mm)Rubber outsoleYarn in upper contains at least 50% Parley Ocean Plastic and 50% recycled polyesterColor: Core Black / Matte Silver / Beam Pink
  • Product code: GX5928

Additional information


UK4.5, UK5, UK5.5, UK6, UK6.5, UK7, UK7.5, UK8

Fitting Guide


How to measure your foot length

  • Stand with the heel to a wall and put a measuring tape under your feet
  • Read off the measured foot length in millimeters before your longest toe
  • If you are between two sizes, choose the next higher, because feet are minimally greater under load

You can also use our template:
Download the foot measurement template

Birkenstock products are offered in European sizes. Please reference our Size and Width conversion charts below to determine your SA/UK size.

Your feet should be able to move freely without your toes hitting the edge of the footbed.


Convert your SA/UK size

Fitting Guide – Birkenstock® South Africa


Before trying them on, put one hand under the toe and one under the heel, then flex the footbed a few times. This will initiate the break in period and will your help your new sandals feel comfy sooner.

Open all straps and step into the footbed. Close the straps comfortably, leaving enough space to allow your feet the freedom of movement. Exhale and enjoy.


For the first five or six times you wear your new footwear, limit the time to just a few hours. This allows your feet and body to gradually get used to the contoured arch support as well as the straps and buckles.

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