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Full aero from Kask comes in the form of the Mistral TT helmet. Delivering speed with concealed ports for ventilation that don't compromise airflow, the close fit and mid-length tail maximise your power savings.
Full aero from Kask comes in the form of the Mistral TT helmet. Delivering speed with concealed ports for ventilation that don't compromise airflow, the close fit and mid-length tail maximise your power savings.
Kask

Kask Mistral TT / Triathlon Aero Helmet : Black / Red

£271.15 £319.00 15% off
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Anxiety-free returns

Returns and exchanges

If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days of placing your order, by post or email of your intention to do this.

RETURN ADDRESS:

Returns Department
7hundred Ltd
68 Peascod Street
Windsor
SL4 1DE

We will issue a refund, credit or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

Store Credit is valid for 2 years and cannot be redeemed for cash at any point.

Where you require an exchange, for example, because a size has been incorrectly ordered, we will make a £4.95 charge or deduct the value from Reward Points where available, to cover re-delivery costs.
(Note: For larger items such as wheels, smart trainers, this charge may vary and you will be informed of the price before the item is sent).

Payment for this must be provided before we will send out the replacement item.

For European and International orders the charge will vary depending on the current cost of delivery to that country. For an accurate price, please contact us before returning your item.

Sorry, we cannot accept returns of books or software where any seals have been broken or working products that have been used.

Please note :

  • The item is your responsibility until it reaches us. For your own protection, we recommend that you send the parcel using a delivery service that insures you for the value of the goods.
  • The cost of returning the item to us is your responsibility.
  • The parcel can take up to 7 working days to be processed once received.

* Note: when trying on items of clothing, please ensure that you are not wearing perfume / aftershave or a deodorant which may leave a scent or marks on the item. In the case of cycling shorts please ensure that underwear is worn when first trying them on. The item(s) must be returned in its original packaging with all labels and tags and with all enclosed documentation.

We will be unable to accept the return of any item where there is evidence that these instructions have not been followed.

For large items such as bikes, trainers and associated large / bulky accessories and wheels, we reserve the right to charge a re-stocking fee of 5% to cover our administration costs.

Faulty Item

If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

Incorrect Item

If the item you received is not what you originally ordered, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return.

All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice.



You can submit a returns form here:

Returns Form

Kask Mistral TT / Triathlon Aero Helmet : Black / Red

Season:2019

Brand:Kask

Code:CHE00050-226.

The Kask Mistral is an exceptionally aerodynamic TT and Triathlon helmet developed using extensive wind-tunnell testing to offer riders maximum watt savings.

With a medium size weighing just 345 grams, the Mistral helmet offers scientifically optimised shaping and a medium length tail working to reunite airflows as they leave the helmet, each and every contour of the helmet is smoothed and optimised for real-world gains out on the road. Combined with the use of a magnetic visor, this helmet offers you a real advantage on your ride, working to manage airflows for the most favourable performance.

The internal pads and adjustment systems are identical to the Bambino Pro so if you have used the Bambino Pro you will be familiar with the feel - even the lateral covers for the ears give the feeling of wearing the same helmet; while the straps and fitting are as secure. As you would expect from Kask, protection levels are among the highest so you can rest easy knowing that the helmet offers the top level of shock absorption that assures your protection on the road.

  • €326.80
    EUR
  • $545.21
    AUD
  • $488.20
    CAD
  • $603.02
    NZD
  • $340.86
    USD
  • CHF304.58
    CHF
  • kr3,761.70
    SEK
  • kr47,420.93
    ISK
  • kr2,437.71
    DKK
  • kr3,860.35
    NOK
  • ¥53,318.75
    JPY
  • KASK WG11 ROTATIONAL IMPACT TEST

    WG11 is a rigorous protocol for helmet testing specifically targeted at measuring the impact of rotational forces on a headform during a crash. This is the methodology adopted by Kask for their helmet testing and the Impact conditions are based on real accident data. This approach yields properly informative data that guides construction.

    Most of the tests on helmets that use rotational impact prevention technologies (like MIPS) are carried out using headforms whose coefficient of friction is much higher than those of a human skull and therefore do not reflect reality.


    The "pass-fail" criterion is based on the BrIC value, an algorithm that defines the level of brain injury. This value must be less than 0.68.

    The final test protocol is:

    OBLIQUE IMPACT TEST
    Oblique tests @ 45°, impact speed 6 m/s, BrIC < 0.68
    + grade 80 closed-coat aluminum oxide abrasive paper
    + headform nominal coefficient of friction 0.3
    + wireless system: triaxial accelerometer + n. 3 ARS
    Headform: EN960 series

    Measurements:
    Peak of rotational acceleration, Peak of linear acceleration, HIC, BRIC (< 0.68)

    ALL Kask helmets successfully pass this test, with values that are never above a BrIC 0.390

    Technical Information

    Kask Mistral Tech

    Sizing Information

    Kask Mistral Size

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