70 reviews
Grey Marle

Extra protection for your neck, nose and chin when Jack Frost turns from playful to severe. Heatwave Merino keeps you toasty and well covered should there be a 'stand and deliver' moment mid ride.

  • Heatwave hi-performance thermal fabric combines a merino inner layer with a fast-drying polyester outer.
  • Cosy, but not quite as toasty as the Black Hole made from Hot Shot™ stretch merino.
  • One size fits all.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 60 gm

A bi-component thermal fabric combining 51% merino wool and 49% polyester. Superfine 18.5 micron New Zealand merino wicks sweat away from your skin while the polyester provides a durable, non-pill outer. Lightweight at just 170gm/m2 and machine washable. Developed by Ground Effect and knitted just for us.
  • Composition: 51% merino; 49% polyester
+Man vs Wild
Merino is unrivalled for comfort as a body layer. It absorbs more moisture than synthetic fibres, mopping up excess sweat rather than letting it settle and cool on your skin. However high-aerobic activities like cycling will often overload ordinary merino. Heatwave's polyester component repels moisture to avoid total saturation of the fabric - so it dries faster to keep you toasty.
+Snug-as-a-Bug Fit
Heatwave™ Merino tops are intended to hug your body, ensuring the fabric sits against your skin to wick sweat away - keeping you dry and not chilling out.
+Hot 'n' Cold
As a single garment Heatwave™ Merino regulates your temperature through a wide range of conditions. Delivering comfort in all but the hottest climes. Yet it is versatile enough to layer under a WindFoil™, microFoil™ or HydroFoil™ shell in winter.

+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
4.8 Based on 70 reviews
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    A Ground Effect Customer
    Mark B.
    Australia Australia
    Luv the Scruff

    The Scruff is a lightweight addition for cold mornings that takes the chill off. Being Merino, you can leave it on for a wide variety of temperatures and conditions. Covering the gap between the top of your shirt/jacket and your neck, it also keeps the cold from getting inside your outer layer. Merino helps it remain versatile. Trendy colour looks cool too.

    karen i.
    New Zealand New Zealand

    Perfect for cold & especially those 'I dont know what temp is out there today' moments.

    Brad D.
    Australia Australia
    Scruff enuff

    Have been using a “Black Hole” for a few years now - works for me, an absolute essential keep the cold out item! Was looking around for family Xmas stocking fillers and decided on a scruff each for the wife and kids. Went with the Scruffs as I already had the “Black” covered and they allowed for personal “colour coding”. I am certain the scruffs will be well received and well utilised. Thanks.

    Kerri M.
    Australia Australia
    Warm and attractive

    Love the grey one of these (even gopopd for casual wear) and the hi-viz one is good too. A little wide at the top for me (female rider) but the length is good and the V at the front is useful for draughts.

    Alan L.
    Australia Australia

    So good. I bought one on impulse as an afterthought when shopping for new knicks. I love it and am sad to see it's not on your catalogue anymore. I hope you bring it back as my wife wants one too and she ain't having mine!

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