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The long sleeve you'll reach for every single day. Soft enough to sleep in, technical enough to ski in, warm when it's cold.
The long sleeve you'll reach for every single day. Soft enough to sleep in, technical enough to ski in, warm when it's cold.
The Adult Merino Iksplorer Long Sleeve is the workhorse piece your wardrobe has been missing. Built from 100% merino wool, it regulates temperature naturally so you stay comfortable from cold morning hikes to warm afternoon trails, without ever needing to peel off a layer.
The top that earns permanent residency in your rotation.
Built from 100% merino wool, the Adult Merino Iksplorer Long Sleeve does what no synthetic layer can. It regulates temperature naturally, wicks moisture before you notice it, and resists odour through days of wear. Wear it under a mid layer on the mountain, as a standalone top on the trail in spring, as a sleep shirt in a chilly tent, or under a cardigan for a day in town. Most Iksplor families find they are reaching for it almost every single day once it lands in their wardrobe.
The thumb holes keep sleeves where they belong under gloves and jackets. The extra length tucks in properly without riding up. And the fit is designed to work both ways — flattering enough to wear on its own, fitted enough to layer cleanly underneath something else.
Sizing note: The Iksplorer Long Sleeve fits with a relaxed cut. For a fitted base layer feel, size down. For a looser everyday top, stay true to size.
Fabric
100% Responsible Wool Standard (RWS) Merino Wool
200gsm, 18.9 micron — lightweight, breathable, and perfect for year-round use
Where It's Made
Our merino wool pieces are thoughtfully crafted in Vietnam by skilled artisans following RWS guidelines. We believe in producing responsibly and sustainably, ensuring fair working conditions for the people behind our products.
How to Care
Storage
Store in a clean, dry space. Use airtight bags or bins and add cedar blocks or lavender sachets to prevent moths. Wash or air out periodically to remove any residue that may attract them.
Lightweight and easy to pack.
Superfine and naturally soft.
Year-round comfort.
Machine wash, lay flat to dry.
The next-to-skin layer is the most important. Our merino will keep you dry, warm and comfortable making for better, longer adventures outdoors.
Merino comes from our wooly friends, the merino sheep. Unlike polyester and synthetic fabrics that sit in landfills for hundreds of years, this top composts in six months instead. It's 100% natural merino wool, renewable and biodegradable from sheep to soil.
Yes. Made from 100% RWS certified merino wool.
No. Superfine merino fibers feel soft against skin, not scratchy like traditional wool.
Yes. At 18.9 microns, the fibers are fine enough to bend rather than poke, which is what makes merino feel soft rather than scratchy. It's gentle on most sensitive skin from day one.
Both. It's soft enough to sleep in, technical enough to ski in, and works as a standalone top or an underlayer when temperatures drop.
The Iksplorer Long Sleeve fits with a relaxed cut and runs long through the body and sleeves. For a fitted base layer feel, size down. For a looser everyday top, stay true to size.
Resell it through Iksplor More and give it a second life with another family. Or compost it. 100% merino biodegrades in months, not centuries.
Overall rating: 4.9 / 5 from 28 reviews.
I have this base layer shirt in 4 different colors. Living in the colorado mountains I can't say enough good things about this shirt! I have nordic skiied, downhill skiied, ran >15 miles in this and just been a mom for everyday activities! I really can't recommend it enough. It is worth the price as it can just become a very important staple in your closet! 10/10 recommend!
Love the merino sets from Iksplor! They help keep my daughter appropriately warm and cozy in colder weather and even on the kayaks in the sun! I also enjoy the tops for me when hiking to keep my temperature regulated!
grown up iksplorer long sleeve
Store owner replied: What a beautiful photo! Thank you for absolutely making our day!
Always a reliable quality and bold colors that don't fade. 👍🏽
The perfect fit! I have worn the women's large with both pregnancies now (and while not) and will use the nursing tops again to. My favorite merino wool layer on the market! 10/10 for softness, length and fit.
Soft and so super warm!! Need less layers with this on in freezing Maine winter
I am 5'4, 115 lbs and I ordered a small. I love it and want more! I also want to order pants. My kids and I live in our wool layers from Iksplor.
It fits great!! Glad I read the reviews. If you have a big booty, or wider hips go a size up, even with your tiny waist 🙃
Love the color! Looks great on and is true to size. This is my first purchase from this company and I wasn’t disappointed.
I love the long sleeve top and I actually look forward to getting another one at a later time!
Super soft and breathable for outdoor workouts.
Too tight. Had to give to a friend.
We're stoked. My son can wear this for a long time as I bought it a little large but I know the quality and it will hold up for years as he grows through it.
The weight of the fabric is perfect for fall-spring wear and cooler days in summer. So soft and cozy, I often use mine as a sleep shirt in my chilly house. The quality is excellent! My 8 year old granddaughter adores her set, and while I love the color green, I am still waiting for the adult top to be available in hot pink so we can “match.” Also, your customer service is outstanding. Thank you for your wonderful products and service.
Great quality!
Love the top! Not too long to leave untucked but stays in place when tucked in. Arm length perfect for either “glove” option with the thumb hole or normal. Not itchy (huge plus). Washes well (cold in a protective bag, air dry on clothes rack). I wear it both as an underlayer during the cold or as a simple top by itself. Great product!
Absolutely love my iksplor long sleeve top! I have the black that I wear working, as pajamas, skiing, and know that I will be using it all summer camping and adventuring as well. Will be buying more!
Fits true to size - I bought a S and XS since I wasn’t sure if there would be room to grow. I’m typically a XS on top. Both still fit over halfway through pregnancy and they’re basically all I wear. There’s plenty of room to grow still and it doesn’t seem stretched out.
Great fit! Most baselayers feel short on me but this is long and the sleeves are long and I really want to wear it always! It's soft and comfortable and although I live in a mild climate it's just perfect for cool days when I am in between wanting to put a jacket on or now. Seriously so happy with this purchase! I love it just as much as I love the toddler one for my son.
I absolutely love these layers!!! They work just as well for skiing or lounging around the house, and are absolutely the coziest to read a book in!
We've been wearing Iksplor layers for a few years and I was so excited when adult base layers finally landed! The base layer top is soft and warm and I've definitely had a few days hiking when I'm almost TOO warm, which never happens for me as I'm always cold. The torso is nice and long, and the sleeves are long enough to let the thumb holes be comfortable while I move my arms around and not restrictive.
I ordered this for my daughter in law. She was over the moon both about the thumb loops and also the fact that it was cut long. She is very, very happy with the shirt.
The arms with thumb loops were an experiment for me. Didn't like them. LOVE the color and the feel.
It’s a great item and so comfortable!
Love the top even more than I anticipated. Fits nice and so soft and cozy.
A beautiful comfortable shirt. Recommend!
Amazingly soft and comfortable. Absolutely love and recommend to anyone!
Love the color and long fit. Super soft and not too hot under other layers.
Very comfortable and easy to layer
