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93 reviews
Jet Black

Thermal bodywear to keep you buzzing through the depths of winter. Layer the Ristretto under your favourite riding top - the superfine Lightwave™ Merino wicks sweat away so you stay warm 'n' dry. Make mine a short black.
  • Lightwave™ hi-performance thermal bodywear combines a merino inner layer with a fast-drying polyester outer.
  • Flat seams for enhanced comfort.
  • 'Snug-as-a-bug' fit keeps the fabric against your skin to wick sweat away.
  • WhaleTail™ cut keeps you tucked in.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 140 gm

+Lightwave™ Merino
A bi-component thermal fabric combining merino and polyester yarns. Superfine 19.5 micron merino wicks sweat away from your skin while the polyester provides a durable, non-pill outer. Lightweight and machine washable.
  • Composition: 46% merino; 54% polyester.
  • Weight: 150 gsm.
+Man vs Wild
  • Merino is unrivalled for comfort as a body layer.
  • Its natural fibres help fend off the big stink on multi-day epics.
  • Merino absorbs more moisture than synthetic fibres, mopping up excess sweat rather than letting it settle on your skin.
  • However high-aerobic activities like cycling will often overload ordinary merino. Lightwave's polyester component repels moisture to reduce total saturation of the fabric - so it dries faster to help keep your cool. Ideal for going hard 'n' fast, and for wearing under your rain jacket.
+Hot 'n' Cold
Lightwave™ Merino regulates your temperature through a wide range of conditions. Delivering comfort in all but the hottest climes, as well as a thermal layer under a WindFoil™, microFoil™ or HydroFoil™ shell in winter.
+UPF 50
UPF 50+ rating extends your no-burn time by 50 times over bare skin. Designs with a stand-up collar and long sleeves maximise protection from the sun's UV rays. Yank 'em up if it gets too stifling.

Ground Effect tops are cut with extra length in the back... and in the sleeves too. So when you stretch out in search of the perfect downhill position, neither your shirttail or sleeves will ride-up to expose your back or wrists to the elements.

+More than Kiwi Made
Ground Effect clothing is crafted right here in Aotearoa | 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.


▸ Why is Lightwave™ Merino so comfortable next-to-skin?
  • Lightwave™ Merino combines the comfort, warmth and low-odour properties of merino wool with the durability of polyester. Merino wool absorbs more moisture than synthetic fibres like polyester or polypropylene. This makes it very effective in dealing with excess sweat - it is absorbed into the fabric rather than settling (and cooling) on your skin. The polyester component repels moisture which avoids total saturation of the fabric - helping it to dry faster. The strength of the polyester also maintains the shape of the garment and minimises wear 'n' tear and pilling.
  • The Baked Alaska, Popsicle and Hot Toddy are intended to be used as a stand alone cycle top in cool, as opposed to cold, conditions.
  • The Thermos, Isotherm, Ristretto, Submerino and Inferno are all base layers - best worn directly against your skin.
  • The Berglar, Flying Nun, Median Strip, Hula, Neopolitan and Lozenge are riding jerseys, with additional features including rear or hipster pockets. For use in both hot and cold climes and versatile enough to wear as an insulation layer in winter.


  • 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 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 repellant finish.

  • Wash colours separately.

  • Items are generally packed and sent the same day your order is received.
  • Costs $9 by overnight courier within New Zealand.
  • NZ$12 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 93 Reviews
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    Filter Reviews:
      Joachim C.


      Last Christmas, my little blister sent me one of your Ristretto merino vests. While I do regularly cut a swath through the streets of London on my mountain bike, it's rarely wearing my Ristretto. Occasionally I swap slicks for knobblies and escape to one of the forests on the outskirts of the city, but my Ristretto seldom goes there either.Clubbing and dancing zouk-lambada is where the top works its magic. Surprisingly, dancing is a hi-energy activity... and it's close, very close. Brazil is home to zouk-lambada. The weather is hot and the girls show a lot of skin. To help the local girls do their bit, London clubs crank the heating to replicate a Brazilian summer. It is said that girls glow rather than sweat. But us boys definitely sweat - not great when getting up-close with a ******** clad woman. The 'I've just run a marathon, smell like an old trainer and am likely to drip all over you' look is a sure way to be sentenced to a night of dancing alone. Somehow the Ristretto's magic merino blend disguises any sweat. And somehow its wicking ability means that the game isn't up when a girl gets close. Even when sweating like the afore mentioned marathon runner, it still feels pretty much dry. And it does all this without the plastic feel of other sportswear.Mmmm - maybe I should get a second one for riding me bike after all.

      Tom R.

      Ristretto - my "if-in-doubt-i-better-wear-this" base layer

      Big fan of the ristretto, I have had a succession of them over the last decade. I really rate the sleeveless style for versatility. I choose to wear it when there is a chance of changing weather - which is pretty much always in NZ. Enough to cut through the chill, but not too bulky to be a pain if things warm up. An absolute essential for road or mtb. Usual Ground Effect quality construction.

      Shane B.

      Does what it says

      Great fit and works well as an extra layer without being bulky or overheating you, especially in the cold we've had this winter in Melbourne



      It is so comfortable I’ve taken to wearing it on cold days under normal clothing. It doesn’t bunch up, the sleeve linings are smooth and the fabric warm so it fits well under a normal shirt & jacket and keeps me nice and warm. Oh, and I use it when cycling on cold mornings too!

      Betty b.

      I buy all your products

      I buy all your products for my son- in- law..he loves the Restretto top because it's a good layering top and it's made of good quality merino.