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All sizes are given in US Sizing
| Men's | Women's | |
| S | 4 - 6 | 5.5 - 7.5 |
| M | 7 - 10 | 8.5 - 11.5 |
| L | 11 - 14 | 12 - 15.5 |
Measurement given for bicep width and arm warmer length. Measure around the fullest part of your upper arm in a relaxed position.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
Approximate measurements only.
| Bicep | Arm Warmer Length | |
| XS | 27 - 28 cm | 45 cm |
| S | 29 - 30 cm | 46.5 cm |
| M | 31 - 32 cm | 48 cm |
| L | 33 cm + | 49.5 cm |
Gloves
Hand Length - Measure from the top of your middle finger to the base of your hand.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
Chaser Gloves:
| S/M | 16.5 cm |
| L/XL | 18.5 cm |
Pace Gloves:
| S | 16.5 cm |
| M | 18.5 cm |
| L | 20.5 cm |
To measure your head circumference, take a sewing measuring tape and wrap around your head so that the measuring tape winds just above the ears, in the middle of your forehead and in the centre back of your head.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. Approximate measurements only.
| Head circumference | |
| S/M | 50-60 cm |
| M/L | 60-70 cm |
For further assistance with sizing, contact us here.
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These beauties arrived just as I was heading out for a cool night on the trails. They did not disappoint- very pleased (and love the little postcard)
These couldn’t be better! Perfect fit. So soft, and long enough for my arms. Perfect for starting cold runs and small enough to hold or tuck away once warmed up. Excellent quality product.
Perfect for those cool start runs.
Fit perfectly and do not roll down. Will definitely be recommending to other people
Very well fitted and comphertable they are great for winter runs
My arm warmers are so soft, fit perfectly and don't roll down.
LOVE MY ARM WARMERS. JUST PERFECT FOR THOSE COLD MORNING WHEN YOU NEED SOMETHING MORE THAN A SINGLET OR T-SHIRT YET YOU KNOW YOU WILL WARM US SOONER OR LATER. THEY ARE SO EASY TO JUST RIP OFF AND THROW INTO YOUR PACK WITHOUT MISSING A BEAT AS YOU KEEP MOVING ALONG THE TRAIL. HIGHLY RECOMMENDED.
learn More Got questions about what item will fit you best or which fabric is most suitable for your adventures? We’ve developed a quick guide to help make choosing the perfect layer easy.
read more review here “ I can honestly say your products are at least 25% better than (that other brand). And I’m a Kiwi. Not to mentioned feeling better about Fiji production and the fact that your cuts fit me better. The weaves are also finer and feel softer. Good on you and please share this with your team. I love supporting you! Heaps good.”
Find out more While Merino is an amazing natural fibre, not all Merino fabrics are created equal. At ioMerino, we make our own fabrics, using only the best quality fibres, and to very specific specifications that make the most of the natural benefits of Merino. All of them are 'Merino rich’. No cheap blends passed off as Merino. No cheaper scratchy fibres or synthetic substitutes to save money. No unethical production. And each fabric is made for a specific purpose. So if you see something with a small amount of elastase or nylon added, you can be sure it absolutely needs to be there to enhance the natural stretch and durability.
It took every bit of our 140 years of experience in the wool industry to perfect our fabrics, but we think you’ll agree the end result was more than worth the effort.
Ethically Made. Ethically Sourced. Perfectly Natural.
Lightweight 170gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric.
Lightweight 160gsm 83% Australian Merino Wool blended with 12% nylon blended for extra durability and 5% Elastane for stretch and comfort.
Midweight 265gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric.
Made from 45% ultra fine MERINO (Ultra Lightweight 150gsm), 45% natural TENCEL (made from sustainably grown wood fiber), and 10% nylon for extra durability.
Ultra Lightweight 150gsm 100% Australian Merino Wool. A MicroMerino® Fabric.
Midweight 280gsm 76% Australian Merino Wool, 15% Elastane and 9% Nylon for extra stretch and compression properties.
Ultra lightweight ribbed 155gsm 100% Australian Merino Wool. A MicroMerino® Fabric.
Outer Weight 280gsm Fleece 100% Australian Merino Wool. A MicroMerino® Fabric.
Midweight 260gsm 100% Australian Merino Wool. A MicroMerino® Fabric.
Midweight 260gsm waffle texture 100% Australian Merino Wool. A MicroMerino® Fabric.
Midweight 255gsm French Terry 100% Australian Merino Wool. A MicroMerino® Fabric.
