High-Performance Merino Wool Base Layers for the Trails, Camping and Hiking

I bought 2 different style beanies and they are awesome! Great service Thank you for our beautiful Australian Wool beanies

I own ‘a lot’ of high end (& damn expensive) compression leggings as I lift weights regularly. These are EXCELLENT leggings in every way.
They are soft, breathable, temperature regulating, firm fitting yet not pinching at the waist, flexible and squat proof.

I will be wearing these as my every day leggings due to the high waist and comfort factor.
I wear my jeans stretch and tight fitting and am a size AU10 with solid legs and a regular waist and the size Medium fit like a glove. I will absolutely be buying additional pairs.

I have had these tights for approx 2 months now and can not fault them!! Absolutely the most comfortable well fitting tights I have ever owned. Sizing is spot on as well.

The tank top works on its own or, in the cooler Tasmanian weather, under a long sleeve top when you don't want two sets of sleeves.

I have 2 pairs on rotation. They are the best fit and most comfortable track pant I’ve ever owned. The cut and fit are perfect. They wash up really well too.

Loved this top from the moment it arrived. Soft and comfy - my go-to when changing out of the work wear at the end of the day. It's also been my outer running top for cold mornings, then gets tied around my waist once I'm warmed up. Love the fact it can see a lot of wear between washes, and it's held its shape well.

I've just received two more of these after wearing my first two almost every day, winter and summer... so good! So comfy, they fit well and wash and wear well. I'll keep buying these over and over again.

I use these for cycling on cold mornings and find them just right. I like to stop and take photos along the way and I was able to handle both the phone camera and camera pretty well, leaving the gloves on. Lightweight but warm enough. Really happy.

I bought this on a bit of a whim, not sure what to expect. I am a 12/14 so bought the L and it is snug. But fits perfectly. When I buy zip tops in the Altitude range for layering over a base, I will size up. The top is gorgeous though. The fabric quite silky and smooth, and the seams also smooth. As a first time buyer, I am so impressed that such good quality Merino active wear is available in this price range. And I get to buy local which is fantastic. Delivery was easy and quick, given I live regionally and we have issues with postal services due the pandemic. Very happy.

To be honest I think I may need this hoodie surgically removed as it is so comfortable and warm on the cold evenings and mornings! The fleece quality is excellent and the fit good. I love it. I really do. So impressed with the quality.

The best leggings I have ever had (and Ive had lots!). They are so comfortable and light but still warm. Really soft and I love the waist band. These will be my go to from now on :)

Super comfortable, great fit perfect temperature control like all ioMerino.
Once you start to wear ioMerino you can’t wear anything else, it’s that good!

I only ever run / ride in wool socks now. This pair is good for on the bike when you need a little extra warmth

I just love these briefs. Perfect for running and everyday wear. I will gradually replace all my undies with these

I have one of these already which I wear as a neck warmer and now a head scarf to help my bad lockdown hair days. Bought a couple more for some colour diversity in my zoom calls :)

Feels great! Easy wash & wear. Just a great base layer for pretty much everything....cycling, hiking or just day to day as a layer of warmth.

This jacket is magnificently warm. The knitted finish on the outside hides a wonderfully soft interior. The pockets are roomy and the zip up front and hoodie tie allow you to secure the front of the jacket and dash off into the chilly morning. As you warm up, the zip allows you to circulate air to your body, and of course, it whips off easily when you need to remove it mid-run, and tie it around your waist to complete the run. This is a great jacket and I would strongly recommend it.

Put these socks on for the first time and I heard my feet heave a sigh of relief! I have been given them a hammering wearing them day in and day out but cannot get them to stink up!!J ust loving the feeling of wool on my tootsies!!

Every item I buy from iomerino I wonder how I did without. The socks-amazing!! The long sleeved tops-fanbloomintastic!! The service-brilliant. Do not hesitate to buy these products. They are second to none!!!

Extremely happy with the zippered long sleeved shirt - so light and warm and well made - will be getting another !!

I've been riding in merino jerseys for several years. These are the best I've worn yet. Super comfy, xlnt fit (I'm 180cm and 73kg, size M), very warm, and no stench.

I got these for my husband and his first words about them were “so comfy”... He’s loving wearing them for layers and sleeping, as well as recovery after runs. Great fit, no chafing complaints, not stinky or sticky. An all round winner!

Liked this so much I've bought another. Really soft and also warm for how light it is.

This is my second altitude crew top. It looks and feels great. The colours are gorgeous too (boysenberry marle and port marle). I find this top perfect for casual wear, walking, computer cycling, hiking and camping. It looks good on it’s own and fits well under another layer. Great customer service too. The team were very quick and responsive resolving a wee issue.

Feels super smooth on the skin and perfect fabric thickness not too heavy and not too light.

Is a great cut & lovely soft fabric, I loved it so much I bought a second.

I bought this hoodie a few years ago and was super excited to see it made a comeback. I wore this thing so much I eventually got holes in it. Money well spent and I was sad that at the time I was not able to order another one. Welcome home hoodie, you have been missed❤

I love the ultra tee, it's not as thick as the altitude which I find perfect for running. It's a nice loose fit which is great and does not smell at all. Layers perfectly with the ultra zip. The fabric is so comfy!

This is great shirt, the logo on the back is really cool. It's probably a little thick for most QLD weather but great for the early morning runs in winter. It does not stink, ever! Tighter fit compared with the ultra tops.

I wear this long sleeve running and hiking. Actually I wear it a lot because it is so comfortable and it doesn't stink like synthetics!! Requires minimal washing. Nice loose fit so you can layer up with a singlet/shirt underneath. No chafing what so ever (even under a hydration pack). I love the zip because you can control the temperature.

Best Hooded Zip Base Layer!Quality clothes. I recommend to everyone

Truly, I have never had any product in wool that feels so good quality and that I feel will not wear thin in the sensitive-wear areas. I am a Norwegian and grew up wearing woolen underwear, so I am speaking from experience. I can move with ease and I also do not feel claustrophobic inside too much tight stretch and itchy sweat producing wool. Thanks for making such a great product that I hope (since it looks like it) will last me many years.

Wore my ultra zip today. Went on a short 10k hike, in cold (15deg) wet conditions. I wore it as an outer layer, with a merino singlet under and a rain jacket over the top. It kept me warm and regulated my body temp throughout the day. Love it!

I have owned several pair of these crops for years. I finally had to give in and buy 2 new ones to replace my well-worn old ones. I wear a 4 or 6us shirt, 34B bra and I am 5ft4 about 135 pounds. Medium fits great. I love these things. Great support for my girls for yoga, running, wrangling rescue hounds, hiking. They never stink. I wash them on wool cycle (rarely). are comfortable. Thank you IO!

I bought a few pairs of these after my sister recommended them. Super comfortable. They were great on our trip to Sri Lanka- it was really humid and after a long day of sweating and walking around they were still fresh and I could have worn them the next day if I wanted to. I was so impressed I bought some jocks for my husband and he loves them.

I've been buying merino undies for years and these have the edge over all others. Comfortable waistband and legs and super soft all around. Sizing is spot on. I just wore these for a 12km trail run, so have definitely put them to the test and they passed with flying colours. Oh so good.

Can confirm this crop is better than equivalent 'other' brand. It's like a second skin, so comfortable and soft, yet also supportive.

I own 3 of the Altitude Zips, worn on various ski trips in France as a base layer under my ski jacket. They have successfully kept me warm in the cold weather, even combatting a hail storm on the slopes this week. They also helped to regulate my body temperature when the sun was shining, I just zipped down the front to keep me a bit cooler. And as promised, no smell, even after 3 days of intense skiing. The colours and design also look quite fashionable for the apres ski :). Quick shipping from Australia to England, arrived in a few days.

I cannot say enough good things about these pants! I found the holy grail! I got the medium and I’m a size 6 in Lululemon Align Pant- my former go-to, before these hit the market- which fit great but never lasted that long, and more importantly were not wool. These are made from the IDEAL merino fabric: soft, stretchy, perfect compression, comfortable, you can wear them day after sweaty day and look sleek, fit and fresh. Warm or cool these pants are making you comfortable. The waist band, fits to your form like the Align (absolutely no muffin top no matter your figure), but with more compression, that makes you look instantly more fit. I’m just so happy to have found my true pant love. Super versatile, from snow, to trail, to treadmill , to studio, to sofa. Worth every single penny. Can’t wait to save up for a second travel pair! The only pant-like-this you need for all seasons and reasons.

I love the fit of these tights, they look tight but the stretch in them means they don't uncomfortably suck you in like other activewear synthetic tights. They are quite high in the waist which is great, don't ride down or require constant adjustments during your workout. They are a lot thinner than I anticipated which is not to be taken as a negative, I just thought they would be quite thick, and they are not see through. The only changes I would like to see would be at least one pocket in the waistband or on the leg and an assortment of lengths & colours!!

I own wool boxers from four manufacturers. The one from ioMerino are my favorite. I will definitely add additional products from ioMerino!

I bought one of these in a retail store several years ago and finally wore it out. Came looking for more and was so happy to find IO Merino online! Have one more of these now, and another on the way. We have lots of choices here in the US, but so glad I can order from IO, these people are the BEST! Great service, BEST product, keeps me warm and comfortable.

These thin liners are PERFECT for cycling in all weather. I ride all year in Minneapolis, MN, US, and commute 12 km daily from late March through late November. Of course I need a few more layers as it gets colder, but there is nothing finer than these gloves under my cycling gloves on cool crisp spring and fall days when I need some protection from the cold, and as a base layer all the way down to -10 C.

I am a bicycle commuter in Minneapolis, MN, US, and I ride about 12 km to work every day from late March to late November. We are cold climate. I wear this under my helmet down to about 0 degrees C and it is perfect. Could be just a bit longer to cover the earlobes, but it's still a 5 star product. Below 0 C I need two layers, but this is perfect for most of my cool/cold weather needs. Of course merino wool keeps the rest of my body warm on these rides, so I'm happy!