I’ve tested the best women’s merino underwear so you don’t have to!
The clothing you wear when tramping (hiking) is a key factor in your comfort and safety. This also includes underwear sitting directly on your skin!
Merino underwear are a great option for hiking – merino dries quickly and is odour resistant. But there are so many brands to choose from, so which is the best? I’ve tested offerings from some of the main New Zealand brands. Here are my recommendations!
Note: this article contains some affiliate links. If you purchase an item using the link, I will get a small referral fee at no extra cost to you. None of these brands sponsored this post or directly influenced my opinions. If this article inspires you to buy some merino underwear, please use these links. Thanks for supporting my blog!
Icebreaker Merino Underwear
I bought the Icebreaker Siren bikini briefs to trial. They normally cost NZ$49.99 per pair, but OnceIt was having a sale so I only paid $29.99.
Pros: super lightweight and very quick drying, 83% wool.
Cons: expensive (although the most affordable option if buying through OnceIt). A thinner waistband which can dig in or fold over for curvier ladies. An annoyingly long tag that you need to cut off (not a biggie but means you then don’t have the sizing or washing advice). As of 2017, Icebreaker is no longer a New Zealand company.
Mons Royale Merino Underwear
I tried the Sylvia Boyleg (pictured) and the FOLO Brief from Mons Royale. They both cost NZ$49.95 when not on sale. I honestly didn’t notice that much difference between the two styles, the boyleg errs on the side of a bikini style rather than a strict boyleg.
Pros: nice medium weight (between Icebreaker and Macpac), also with 83% wool. Slightly thicker waistband than Icebreaker which I found comfier. New Zealand company based out of Wanaka (although an international brand now).
Cons: expensive. Still has a long tag but better placed than on the Icebreaker briefs.
Macpac Merino Underwear
I bought the 180 Merino Brief (pictured) and 180 Merino Boxers (hotpants) from Macpac. Both cost NZ$49.99 at full price, but I got them on sale (and they’re still currently on clearance) for $39.99.
Pros: the brief was the comfiest underwear I tried across all three brands (personal preference about what fits my body the best), I’ve been meaning to buy some more! Thickest weight material and highest wool content (95%) compared to the others so nice and warm, although not quite as quick drying.
Cons: expensive (we get it, merino is expensive!). The boxers/hotpants were the least comfy brief I tried by far. They kept riding up, but this is likely just personal preference as I’ve had some friends recommend them as the ones they prefer to wear.
So what’s the best brand to choose??
My personal preference would be the Macpac briefs (especially when they’re on sale), closely followed by either of the two Mons Royale styles I tried. If you prefer Icebreaker, definitely check out OnceIt for a much cheaper sale price.
As much as I would have liked to uncover some massive red flags to share, all three brands passed the bar and it’s really about finding what fits your particular body best. I would chose the brief that most closely resembles the style of underwear that you already own and find the most comfortable.
If you have a strong preference for a particular merino underwear, comment below to let me (and others) know which one and why! I’d be interested to hear if there are any winners I missed.
How to avoid ruining your expensive merino
Some common feedback I got from my social media was that some people (not all) found their merino underwear deteriorated really quickly (much of this feedback was specifically about Icebreaker, but I would imagine it would be similar across the board).
Merino is wool – a natural fibre – so it’s really important to avoid using normal washing detergents (and boosters like Napisan), which can cause damage like holes and bleaching. If you want help lengthen the lifecycle of your wool clothes (and when they’re that expensive, you have a lot of incentive to do so!), use a dedicated wool detergent, and a wool/delicate cycle no warmer than 30 degrees Celsius. Don’t wash wool with material that can cause damage (zips, hooks, velcro).
Where to next?
Heuristic Traps in Tramping
Heuristic traps cause fatalities in the backcountry every year. Read this article for an explanation of what they are and how to avoid them.
Where can you wild camp in New Zealand?
It can be a bit confusing knowing where you can legally (and ethically) free camp in New Zealand. Read this article to school yourself on where you should be camping.
Thanks for the research. I am writing from the UK and bought merino briefs online from Howies (based in Wales) and Dilling (a Danish company). Howies briefs are by far the best – the cut is good and the waistband is a proper waistband. Wash really well on a 30 degree cycle. I bought Dilling briefs and boy leg shorts – both washed badly however I must say I did not use the Dilling detergent they recommend: I used a plant-based organic laundry liquid and washed them on a wool cycle and delicates at 30 degrees. Dillings have “woolled up” a bit and definitely shrunk – I stretch them when they come out of the machine. So in the UK Howies are great. Not easy finding merino briefs in the UK. Will try MamaOwl and Cambridge Baby next for comparison. Needless to say – all are expensive!
Thanks so much for sharing Anita! Sounds like expense is similar no matter you location. To be honest I thought they’d be more choice here in New Zealand where we have a lot of merino sheep and use it in our activewear clothing! Glad to hear you’re finding some options in the UK