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138 reviews
Jet Black

Shorts to help the self-assured kick free-loaders off their wheel. The state-of-art eXo™ skeletal pad is laminated to the shorts' body for exact contact with the saddle. While the 12-panel design, Bandolier™ cuffs and s-shaped seams ensure the Sirens map your body for unrivalled performance on the toughest circuits.

  • eXo™ skeletal pad - 3D anatomical shaping, multi-level foam, rapid drying, seamless synthetic 'chamois' pad with anti-bacterial finish.
  • 'Contour fit' with s-shaped seams.
  • 12-panel construction.
  • Full flat seaming for a contour-fit.
  • Wide Bandolier™ waistband for maximum comfort.
  • HighRise™ rear overlaps with your cycle top.
  • Bandolier textured-lycra cuffs.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 180 gm

+Shockwave™ lycra
4-way stretch nylon with a non-shiny finish. It's soft against your skin, yet is incredibly tough and dries quickly. Blended with 16% lycra to deliver body-hugging performance and durability.
  • Composition: 84% nylon; 16% lycra.

This state-of-art eXo™ skeletal pad delivers maximum performance for those who ride long and fast.
  • Pad and shorts' outer fabric are laminated as a single layer – providing increased precision with minimal movement between the fabrics and your saddle.
  • Near-seamless interface between pad and body of the shorts.
  • External and internal differential-density mouldings provide additional padding at pressure points without increased bulk.
  • 3D anatomical shaping, 4-way stretch and seamless construction hug your body for a performance fit.
  • Polyester-knit face fabric against your skin disperses heat and moisture.
  • Bacteriostatic finish for added hygiene.
  • Dries rapidly after washing.
  • Made by TMF in Italy. Market leaders in cycling pad design and innovation. Manufactured in strict compliance with European environmental standards.

Outskirts™ garments are designed specifically for women. However If you're struggling to find exactly what you need in the Outskirts™ women's range, check out our men's products for further size options. Jackets, tights and baggy tops often fit both men and women equally well.

+'S' Seams
S-shaped seams don't limit the stretch of lycra fabrics - ensuring Ground Effect shorts hug and move with your body, not against it.

Textured-lycra bands glue the legs of our premium shorts to your thighs, and provide muscle support – all without the discomfort of gripper elastic.

A stretch lumbar panel and HighRise™ rear overlap with your cycle top to keep you covered. No bare skin or lewd exposure.

+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.


  Chicanes Sirens Mojos
Pad eXo eXo Softail
Panels 12 12 10
Fabric Hot Shot™ Merino Shockwave™ Lycra Shockwave™ Lycra
Bandolier™ Waist Yes Yes Yes
Bandolier™ Cuffs Yes Yes Yes
Sizes 10 - 16 8 - 18 10 - 16


eXo™ vs Softail™ pad?
  • Unlike conventional pads that are sewn into a complete short, the state-of-art eXo™ skeletal pad is a laminated inner and outer 'bum' panel that is integral to the short's construction.
    • This provides increased precision with minimal 'slippage' between the laminated fabrics and your saddle. This benefit is particularly noticeable on extended hill climbs.
    • In addition, the combination of external and internal differential-density mouldings allow for a closer fit and increased flexibility while still providing excellent padding.
  • The more conventional Softail™ pad is also a premium quality solution. However construction is a little less complex keeping the price of Softail™ shorts and tights sharp.
  • If multi-day missions are your gig, or you regularly ride for a couple of hours or more then you'll almost certainly value the enhanced performance of the eXo™ pad.
  • For keen cyclists with a more recreational and less intense itinerary, the Softail™ pad still delivers superior comfort and performance in the saddle. 
▸ Should I wear underwear with these shorts?
Hell no. You want to have as smooth an interface as possible between your bum and the saddle. The seams on your underwear will inevitably be in the wrong place - causing rubbing and saddle sores. Also underwear is generally cotton - nice for everyday use but damp skin below is more susceptible to chaffing.


  • 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.

  • With shorts in particular, cold-water detergents and those with bleach or fabric softner can cause 'nappy-rash' so if you're experiencing issues in that department try a warm 40ºC machine wash and a change of cleaning brew. 
  • A washing machine rinses more thoroughly and is preferable if you have the choice.
  • UV rays accelerate the decay of lycra. Our fabric is knitted so the lycra component lies on the inside of the fabric - shielding it from the sun when you're out riding. Consequently you should avoid drying these shorts inside-out. It's not a bad idea to do so occasionally as the sun does help keep the pad hygienic - although it is treated with an anti-bacterial finish anyway. But drying in this manner is a trade-off with the damage done to the Lycra.
  • It's important to avoid using the dryer for any shorts with our eXo™ pad. This can cause the pad to delaminate.
  • It's common practice to not wear underwear with your riding shorts so you need to wash your shorts daily. And it's recommended to give your shorts an initial wash when they're new - the eXo™ pad in particular becomes less stiff after the first wash.

  • 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
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    Filter Reviews:
      Marjolein a.

      Bottom Line

      We are always on the hunt for a good pair of women's lycra shorts, so we are stoked to have the honour of trying out the new Ground Effect Sirens.Our favourite feature of these shorts is the comfortable, perfect fit - they feel like you're not even wearing them, but in a good way! The leg bands ('bandoliers') are perfect too; they're tight enough not to ride up your thighs, yet not overly tight to squish them and cut off the circulation either. The state-of-the-art eXo skeletal chamois is wicked, and wicking. Ash used these shorts on a cycle tour in California and didn't experience any comfort or chafing issues, even with consecutive days in the saddle. With three cycle short options to choose from, these quickly became her favourites of the bunch. Marjolein has been using the Sirens both on the road and the trails, as well as commuting, and they've become her favouirtes too. They don't get a chance to rest in the wardrobe as they go straight from the washing back line into service!Baggy lovers needn't feel left out either, as these shorts are not bulky at all so you can still chuck on your favourite mud shorts over the top (try the Martini shorts, ladies; they are awesome!).Bottom line - get the Sirens, your bits will thank you.

      Ride O.

      Best Shorts

      If you're not a bib fan, these are top shorts:- Only knicks on test without a seam under the chamois.- The eXo skeletal pad is like a chamois upside down - I settled into the new design quickly. It has multi-level foam and is rapid drying, with anti-bacterial finish. - I commute twice a day and I prefer my shorts to be tight in all directions, which wasn't achieved. -HighRise rear overlaps with your cycling top. - Textured-lycra lumbar panel for enhanced breathability. - Wide bandolier textured-lycra cuffs instead of silicon leg grippers.'RideOn recommends'

      Anna B.

      Sound the Siren

      Perhaps the most intriguing offering sent to us from Ground Effect was the women's Siren shorts. Having known a few women around the traps to swear by their women's shorts, I was keen to see what all the noise was about.The first thing I notice was the superhero-like 'exo' skeletal chamois pad; the chamois of those shorts is both an innie and an outie. The pad itself is laminated into the body of the short for maximum comfort, there safe no seams and on that front, in conjunction with it's fancy multi-level foam, makes for a comfortable bum.Multiple panels are often what set a high end short apart from the riffraff and these shorts are no different, boasting 12-panel and higher midriff also ensure that neither muffin-top, back-gap or sausage leg occurs when riding in the sirens; all good things.First impressions when slipping into the shorts was that they aren't the super-firm European fit we are used to, and while the bandolier sections of the short offer a nice contrast in terms of material and fit, we wondered about how the integrity of the short would go, long term.Ride wise these are nice shorts, we never worried our muffin was overflowing or our sausages were pinched, we could safely say we looked pretty awesome the whole ride. Even with the chamois on the outside! This is coming from a bib-wearer who generally loathes shorts.The chamois was effective, quite comfortable even for a good 4-hour burn on the dirt, we were happy with the comfort of the shorts.

      Victoria B.

      Sirens Ladies Cycling shorts

      Prompt delivery,good fit and comfortable. Very happy with the product.

      Anja M.

      You'll need two pairs...

      The Sirens come with a guarantee, which is somewhat novel for a pair of bike shorts: 'Ride the Sirens (hard) and if they don’t blow you away, return them to us within 90 days for a full refund' So I did. Ride them hard, that is. And I was blown away. I had come to the conclusion that perhaps I had an oddly shaped derrière for which no saddle would ever offer a friction free ride, and no pair of shorts would ever change that. Turns out, a god pair of shorts is the ONLY thing that can change that. And the Sirens are just those shorts. The Siren's secret is the seamless chamois - no hard overlocked edges to wear away at tender nethers, and the slimline design avoids the look and feel of a rolled over incontinence pad. I've loved these shorts from their first ride, and I reckon if you're thinking of buying a pair, you should actually invest in two pairs, because your old shorts will be relegated to that status of your least-loved undies (that is, all the others, including the bikini bottoms, have been used, you're desperate and it's the last resort).