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

    • Toasty merino wool inner and hard-wearing nylon outer.
    • Soft knitted non-gripper elastic cuffs.
    • Knitted with elastane for a snug fit.
  • ▹ Merino-Nylon

    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.

    ▹ 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.

    ▹ Weight

    Garment Weight: 74 gm
    • 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 Ecover, Ecostore, Earthwise 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.


Made by: Ground Effect in New Zealand

Customer Reviews

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  • Reviews (27)

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We value your feedback. If you're stoked with your Ground Effect kit then you might like to share it (the review not the gear) with your mates. Thanks again.
Patrick M.
New Zealand

Arm yourself

"Sun's out, guns out" is the motto for summer days. But while you're waiting for those warm days, the Armadillos are a handy way to keep your arms toasty as you ride. I slip them on before I slip out the door on cool days. They stay put. It's easy to roll them down as the day heats up, then ease them off and into a pocket. I also like to pack them on longer rides so I have something to keep me warm in the evening.

Anthony A.

Armadillo Magic

Great fit, breathes, love them.

Sue N.


I generally really love Ground Effect products but not so happy with the armadillos. I am a fairly average size woman cyclist but the armadillos are really tight.... Almost too tight to wear. Can't imagine how squeezy they are on big men's arms. Hate to have to do a negative review but that's how it is. LOVE the jitterbugs I bought at the same time though. Will be back. Cheers Sue

David Hadfield

Son Benefited

Fast delivery to Perth. Lovely quality and so much more comfortable than neoprene arm warmers, just past mine onto my son. These arm warmers defy gravity, they just stay where you put them, as they should. Great piece of kit GE.

Sharon B.
New Zealand


I'd been looking for quite a while to replace my old arm warmers that had no silicon gripper. These are warm, snug and do not move. I really love them! Definitely recommend them.