The chart is a guide only. If you fall in-between sizes, the right size for you will depend on your body shape, height and how loose or tight you like to wear your clothes. Measurements refer to your body not the garment. Jackets and baggies are sized to fit over under-layers - so you should be the same size in both. It's no hassle to swap an item, if your first choice is not the best fit.
This colour/size is temporarily out of stock. For orders placed today we'll get one to you in about a week... or consider another colour if you can't wait.
Full-length luxury for committed commuters come rain, hail or deluge. 3 layer HydroFoil™ Plus fabric keeps your long pants dry while spiral zipped leg gussets let you pull them on and off over your shoes without any excess fabric to snag your chain.
Specifically developed for high aerobic activities, HydroFoil™ Plus combines a lightweight ripstop nylon shell with a composite membrane that is completely waterproof, totally windproof and extremely breathable. The outer fabric is the latest new-generation Pertex® Shield+ membrane. It is more than twice as breathable as most other quality waterproof-breathable fabrics, and has a small amount of stretch allowing a closer fit. The outer fabric is treated with a water repellent finish that encourages rain to bead up and roll off, while there is a lightweight tricot mesh on the inside for greater durability and improved moisture dispersion.
Composition: 100% nylon with PU laminate.
Waterproofness: 23,000 mm hydrostatic head with water repellent finish on face fabric.
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.
We've extensively tested both full-length and 3/4 waterproof pants over the years. In our experience 3/4's provide the best trade-off between functionality and performance in most conditions - especially for mountain biking, bikepacking and touring.
They are easy to whip on and off over your shoes.
Repel rain from the most exposed areas - your bum and thighs.
Avoid 'chain suck' at your ankles.
Minimise overheating when pedalling hard.
However full-length over trou are sometimes best - notably for commuting when you want to keep your long pants dry, or when touring to really cold and/or wet places.
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 with any of the plant-based products listed above. You can also use a specific sport wash like Grangers Extreme Cleaner, Nikwax Tech Wash or Atsko 'Sport Wash'. Around NZ$30 from most outdoor shops. Any stubborn stains should be dabbed not rubbed clean. For grease spots you can use a degreaser like Swarfega. It's aggressive stuff though so take care - it might be best left alone as added character.
Keep it clean, but don’t wash too often. General wear along with washing progressively removes the water repellent treatment from the outside the fabric. This treatment helps rain to bead and run off - and enhances the overall performance of the fabric. Dirt, body oil, sunscreen and sweat also attack the water repellent treatment and can cause the waterproof-breathable membrane to delaminate. Wash frequency depends on how often and how hard you use your garment. We suggest at least a couple of times a year - certainly after a muddy mission, an especially sweaty ride, or say half a dozen sessions in the rain. Use your judgement - if the garment looks dirty, the fabric is 'wetting out’ too quickly, or feels clammy then it's probably time for a clean.
When the fabric starts 'wetting out', it's time to apply some love. You can help restore the water repellent treatment after washing by line-drying your jacket, then chucking it in the dryer using a warm (not hot) cycle. This 'recharges' the treatment so it lasts a bit longer. When this trick no longer does its magic you can beef up the original treatment to some extent with a product like Nikwax TX Direct - $39 from Ground Effect. A bottle is good for two or three rounds with your jacket. The effectiveness of this process depends on the age and condition of your jacket.
Note that while the fabric's wetting-out impairs performance, particularly breathability, the HydroFoil laminate should still be waterproof.
Always ensure your HydroFoil garment is completely dry before storing. Putting it away damp can destroy both the water repellent finish and the waterproof coating. Hanging on a hook or coat hanger is best. Take care of your gear and it will take care of you.
Just completed the 2023 Geyserland Mega, 5 days of riding from Rotorua across and up into the Timber Trail, Piopio, out to Marakopa on the West Coast then back to Rotorua. We lucked out with the weather big time, and ended up riding in the rain for 3 days. It was crazy wet. Luckily I had bought some Splashdowns for the trip, and spent alot of time riding in them. They are a good mix of loose fitting enough to not be restrictive, but equally not so loose that they get caught up in stuff. The first afternoon in the rain I struggled to keep warm, but then decided to put the splashdowns on and it made so much difference, keeping me warm and making riding in the rain almost enjoyable (probably because after so much rain it became normal !! I feel the cold, so got these full length ones instead of the Helter Skelters, and glad I did. They work really well. Another great product from Ground Effect.
"Splashdowns" worked well in my recent Hebrides cycle tour & the following "West Highlands Way" walking tour; but, my 'medium' size, whilst good in length were VERY TIGHT IN THE WAIST - OVERLY TIGHT!
I am very trim, not at all overweight & I had to use the larger waist clip button & would have preferred a 'looser' setting.
In addition the rear zippered pocket was 'too small & not very convenient to use on-the-go...it requires 2 hands to close...(relocate?)
There’s a special kind of smug that you get when you come in from the howling wind and rain, peel off your wet weather gear, and you’re bone dry underneath. These pants are super comfortable and laugh in the face of wind and rain. Recommended.