• PrimeKnit+ Upper wraps the foot in adaptive support & ultralight comfort.
  • Tailored Fibre Placement offers an uncompromising fit that delivers performance.
  • Supportive Heel Counter giving supportive comfort.
  • Lace Closure System to reduce in-shoe slippage.
  • Boost Midsole delivers 20% more responsiveness & cushioning than ever before.
  • Torsion Spring enhances support on landing & a snappy transition.
  • StretchWeb Rubber Outsole constructed from Continental rubber the StretchWeb flexes underfoot for an energised ride.
  • Features: Lightweight / Breathable.
  • Sport: Running.
  • Type: Cushioned / Neutral.
  • Terrain: Road.
  • Shoe Width: D.
  • Weight: 340g
    Stack Height: 33mm/23mm
    Heal To Toe Offset: 10mm

    We dispatch orders within 24 hours where possible, subject to being in stock and custom programming & setup required. Weekend orders will be processed on the next working day. Please allow 3-5 working days for delivery within Ireland.

    We only ship within the 26 counties of Ireland at present.

    If you have not received your order by this time please contact us.


    All product comes with a one years return to base guarantee.

    If your order arrives damaged due to shipping we will replace it subject to our returns policy.

    All Guarantee issues will be handled by The Run Hub only and not the original manufacturer.

    The customer is responsible for the cost of shipping goods to us under the guarantee.

    The guarantee is in place to cover any problems with the equipment that arise through normal use.It will not cover any problems that are caused by improper installation, maintenance or repairs not made by The Run Hub, unauthorized modifications, or as a result of removal, improper use, abnormal operation by the buyer, or any other misuse or mistreatment of goods.

    By ordering from our website or calling in your order, you agree that you can return the merchandise within 14 days of the shipping date, but must pay the restocking fee if applicable.

    Returns are not allowed after 28 days.

    If there is damage to the item upon return, you will be charged for the cost of new parts/packaging/material to replace the worn or damaged parts.

    The customer is responsible for shipping costs back to The Run Hub

    Refunds can only be processed if the product is returned to our Ashtown store.

    Shipping costs are non refundable for purchases less than €95 and for clearance items.

    Returns are to be approved in writing by The Run Hub or we will refuse receipt of the product.

    Refunds will be issued within 7 days of goods returned subject to the above conditions.

    During exceptional circumstances there may be a delay in processing returns. This will only occur if circumstances outside of our control inhibit our normal business operations eg. government intervention.

    Returns will be processed via the same method as the original form of payment.

    If you return a product and the balance of your order falls below the €95 threshold in value, you will be subject to a €3.50 charge for the original shipping.

    Adidas Ultra Boost 21


    Free 24 hr Delivery For Orders Over €95!

    Available Options:

    Mens Sizes:

    Sizing Guide

    The Adidas Ultra Boost 21 gets some new innovative updates making it a soft, but highly responsive neutral trainer. Adidas tested several different prototypes to deliver a shoe that perfectly blends weight, cushioning, and responsiveness.
    The adidas Ultra Boost 21 has some new innovative updates. This model will have more Boost cushion for a soft landing and a stiff Torsion system to add a propulsive feel. The upper has a flared heel design, a supportive heel counter, and is completed with a knit upper made out of recycled materials.

    Sizing: True to size
    Midfoot Volume: Medium to Low
    Toe Box Width: Medium to Narrow
    Toe Box Height: Medium to Narrow
    Arch Height: Medium

    For the best fit, we advise customers to avail of our detailed gait analysis service.