26 reviews
Size Chart
Jet Black

Knee warmers to winterise your baggies or lycra cycle shorts. Put them on in the cold. Peel 'em off and shove in your back pocket when your motor warms up.

  • Fast-drying, 4-way stretch Hot Shot™ Merino.
  • Gripper elastic at hem keeps them hitched up.
  • Hazard!™ reflective logos on each calf for night time visibility.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 120 gm

4-way stretch winter luxury uniquely combines superfine NZ merino against your skin with a tightly woven, hardwearing nylon outer and lycra to stretch and move with your body. Warm as pie. Developed by Ground Effect and knitted just for us.
  • Composition: 38% merino; 46% nylon; 16% lycra.

Night travel is a spooky experience. Many Ground Effect garments feature our Hazard!™ reflective logo and piping to help remind traffic that we're on the road too.

+More than Kiwi Made
Ground Effect clothing is crafted right here in New Zealand. Has been ever since we started back in 1994. Manufacturing locally works for us. We operate a quick-response system - holding minimal stock of any one item, but churning out a few more quick-smart when the pile gets low. The upshot is that we are seldom caught with our shelves empty, so orders get despatched the same day you place them.


  • All Ground Effect clothing enjoys a warm 40ºC machine wash. Try to avoid cold-water detergents and those with bleach, 'oxygen whitener' or fabric softener.
    • The cold-water varieties have little enzymes that are super-charged to brave the cold but can damage technical fabrics and cause skin irritation. 
    • Bleach rots natural fibres like merino, strips the dye, attacks laminates of waterproof fabrics and can also cause skin irritation.
    • Sodium Percarbonate (the main ingredient in oxygen whitener) can make colours run.
    • Fabric softener and stuff containing it like wool wash destroys the water repellent finish on waterproof and water resistant fabrics, and can cause colours to run. 
  • As a rule of thumb, a product that is easy on the planet is also easy on your body. Select a mild plant-based soap like EcoverEcostoreEarthwise or Aware.
  • Hand washing is sometimes the only option on tour, but a washing machine rinses more thoroughly and is preferable if you have the choice.
  • Most Ground Effect gear dries super-fast so hanging on the line or drooping over the bedpost is generally the best option. High heat can damage some fabrics so if you do take your threads for a spin, set the device on 'medium' or 'warm' rather than hot. A lap in the dryer is recommended for your rain jacket, after it has dried on the line, as it helps recharge its water repellent finish. 

  • Wash colours separately.

Customer Reviews
4.9 Based on 26 reviews
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Filter Reviews:
    Nola T.
    New Zealand New Zealand
    Leg warmers

    Wicked warm fantastic

    Jane S.
    Australia Australia
    Kneecaps - a saviour

    I grabbed these for a 2 day ride (Zoo2Zoo Canberra to Mogo, which was simply brilliant BTW) and they were a life saviour. The weather was just simply cr&$@p on day 1 but i was set with my kneecaps (plus all my other groundeffect gear). They stayed on all day (7am to 530pm and again for most of the second day. I was able to simply oush over my knees in day 2 when it started warming up. Brilliant purchase! And matching the quality of all other ground effect gear.

    James M.
    Does what I wanted it to.

    After a winters riding I give them a thumbs up. Lovely material, sits beautifully under my bike nicks, perfect for bikepacking as well.

    Robert L.
    Australia Australia
    Really great Kneecaps

    Love the quick delivery (to Australia), the significant design thought and implementation of these little wonders. Specifically the way in which flow backwards in the natural design of your leg, with extra padding around the knees. The stitching is second to none and the quality of fabric is awesome.

    allan w.
    New Zealand New Zealand

    i have been trying to get some good ones for years with no success. i am not a cyclist. my legs are not skinny, but the M was far too big and the S needed a stitch at the top to stop them falling down. once that was sorted, they are very good, so anyone with arthritis, i would recommend to you. they are not bulky so you would never know they were under your trousers.

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