64 reviews
Size Chart
Grey Marle

Limited stock - try the new Yoyos if your size has 'sold out'.

Seamless knitted merino arm warmers to extend your short sleeved Median Strip or Hula riding top into a winter assault weapon.

  • Grey Marle with wide reflective cuff.
  • Toasty merino wool inner and hard-wearing nylon outer.
  • Soft knitted non-gripper elastic cuffs.
  • Knitted with elastane for a snug fit.
  • Designed by us. Made in Aotearoa | New Zealand.

  Weight: 74 gm

Toasty Merino wool knitted sock with nylon plated to the outside for durability. Blended with elastic for stretch.
  • Composition: 42% merino; 24% elastic; 19% lycra; 15% nylon.


  • 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 EcostoreEarthwise 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.

+ Shipping
  • Items are generally packed and sent the same day your order is received.
  • Costs $7 by overnight courier within New Zealand.
  • NZ$7 by tracked airmail to Australia.
  • Around NZ$15-25 by tracked airmail to destinations elsewhere in the world - calculated in our shipping cart as you check out. 
    • More shipping and tax details in our FAQ.
    Customer Reviews
    4.8 Based on 64 reviews
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    Filter Reviews:
      Gerry C.
      New Zealand New Zealand

      Excellent product and great quality! Ground Effect Support is every bit as good too...

      Oliver M.
      Australia Australia

      Warm, comfortable not itchy at all and versatile. In fact they are so versatile that my partner (who doesn't cope so well in winter) has started using them more for day to day life and gets regular comments about how good they look. I'll have to purchase another pair for myself.

      Bruce A.
      Australia Australia
      Warm and comfy

      These are warmers are excellent. Not itchy or irritating and fit well despite me having fat arms..... Worn comfortably all day. Worth every cent

      Ashley S.
      New Zealand New Zealand
      Merino Arm Warmers

      Fit real nice, don’t slip down and are really warm great for frosty starts. Other bonus is they fold together and stay together just like folded socks. Great choice

      Maya R.
      New Zealand New Zealand
      ArmA Warmers WOW

      Purchased these on a whim.... sounded quite good being Merino rather than Polyester. Oh my Goodness... WOW. I wore them whilst doing the Tongariro Alpine Crossing. We got everything... Snow, Sleet, Rain, Wind and Sun over 7 hours. These were Amazing to wear as an additional Arm layer. Still to be worn on my cycle, but will be always added to my gear when doing anything Outdoors from now on.