Lost Boys Merino Sun Hoodie - VF Series
Soft & Breathable | Odor-Resistant | Durable
What makes this merino sun hoodie amazing?
- Thin, light merino for warm days. Breathable in the heat, comfortable through cool mornings, and soft enough to layer in winter.
- Wear it for days. Pack fewer shirts. Merino’s natural odor resistance lets you go longer between washes.
- Soft against your skin. Built for real outdoor use. Ultra-fine merino and silky Tencel feel great, while a touch of nylon adds strength and durability.
- Stay covered on long days outside. UPF 30+ fabric and a light, breathable hood give you sun protection without a heavy feel.
- Let more air in when you heat up. Open the four chest snaps for extra airflow without taking the hoodie off.
Risk-free try-on at home.
If you ever damage any of your apparel, we'll repair it for free, for life.
Email Me When Available
Your do-it-all merino layer.
We went on a mission to create the perfect merino sun hoodie. Light and breathable for warm days, comfortable through cool mornings, and soft enough to wear under warmer layers in winter. Something you could wear for days between washes and trust to hold up to real outdoor use.
The magic is in getting the blend just right. Ultra-fine, no-itch merino naturally resists odor and helps keep you comfortable as temperatures swing from cold to hot and back again. Tencel, a fiber made from wood pulp, helps manage moisture and gives the fabric a cool, silky feel against your skin. A touch of nylon adds strength and durability, so you get the comfort and performance of merino in a fabric built to last.
UPF 30+ fabric and a light, single-layer hood keep you covered on sunny days. When you start heating up, four snaps at the chest let you open things up for more airflow.
From a weekend outside to a multi-day backpacking trip, the Lost Boys makes it easier to pack less and get more use out of what you bring. And if you ever damage it, we’ll repair it for free, for life.
The Lost Boys is part of our VF-Series: our most technical gear, built with the most advanced fabrics, the highest-quality trims, and absolutely no expense spared.
Features & Specs
- Best For: Adventure travel, hiking, backpacking, and everyday wear
- Fabric: Thin, light fabric blends ultra-fine merino, silky Tencel, and a touch of nylon for softness, breathability, and durability
- Odor Resistance: Naturally odor-resistant merino lets you go longer between washes
- Temperature Regulation: Breathable and moisture-wicking for warm to hot days. Comfortable through cool mornings and easy to wear as a base layer in colder weather
- Sun Protection: UPF 30+ fabric for long days outside
- Hood: Light, single-layer construction adds sun coverage without bulk
- Ventilation: Four chest snaps let you open things up for extra airflow
- Fit: Comfortable athletic cut for wearing on its own or under warmer layers
- Thumbholes: Keep sleeves in place when pulling on another layer
- Construction: Flatlock seams help reduce rubbing and chafing under a backpack
- Hang Drying: Built-in locker loop makes it easy to hang after a wash
- Series: Part of our premium VF-Series, built with advanced fabrics and high-quality trims
Fabric Details / Weight
- Fabric: 52% RWS-certified Merino Wool, 35% Tencel, 13% Nylon -- RWS certification covers animal welfare, responsible land management & supply-chain traceability. Tencel adds a cooler, smoother feel & helps move moisture away from your skin.
- Weight: 210g (size M)
- Fabric Weight: 130gsm
- Fiber Micron: 18.9 -- The most durable Merino micron we tested that still maintained a fine, luxurious, zero-itch feel in this tencel / nylon blend.
Wash / Care Instructions
Wash cold on gentle and air dry. If using a dryer, do not use heat to keep your Merino gear dialed for countless wears.
We engineered our Merino gear to last and to handle real miles, real sweat, and real outdoor pursuits, but the nature of Merino means high heat dryers and rough wash cycles can shorten its life.
Shipping / Returns
- Fast & Free Shipping: Available on all U.S. orders.
- Free Returns & Exchanges: Items must be new and unwashed.
- Expedited Shipping Cutoff: Orders placed by 12 PM PST ship the same day. Orders placed after 12 PM PST ship the next business day.
- International Shipping: Free on orders over $100.
- More Info: Visit our Shipping & Returns page for full details.
What Customers Are Saying...
Joaquin
Fantastic Merino Shirt
I traveled with this for a few weeks in a hot, humid environment and just rinsed it out in water a few times to keep it fresh but it never got smelly like a good merino! Fabric is nice and soft.
Ain
Good For Cycling In Cold
Bought it for an extra layer for this winter cycling season. It's light breathes really well and help retain some warmth without overheating. Doesn't retain odor like pure synthetics.
Taylor
Amazing. My standard for KETL stuff, and it delivers.
As with everything I've ordered from KETL, the quality, comfort, fit, and look are awesome.es, expensive, but I'm a minimalist, and each piece of clothing I buy needs to be a 9/10 in all areas. KETL consistently delivers, so the value is there.
Compare All Of Our Sun Hoodies
The KETL Commitment
We develop premium fabrics and trims, build our gear to last, and back it with free lifetime repairs. If we can fix it, we will, for as long as you own it. Learn more about our Lifetime Repair Program.
Love these perfect for travel. I have black and tan
Fantastic hoodie I’m buying more
Very well made and fits me well. lightweight merino should be ideal for hot summer climbing in the alps and also work with layers. I like it so much I am buying another.
Love this shirt. All of the sun hoodies are great, but this is the best one. The Merino blend makes it incredibly comfortable, and it wicks away the sweat all day long. Fits great and keeps the sun from burning. Blue Steel is also a great color!
I wore this for a weekend in the Rockies when temps were in the 80s and the sun was fierce. It kept me from getting fried and didn't make me overheat. Then it did a good job of warding off the chill in the mornings. The best part was no stink after days of sweating in it, unlike a lot of the polyester hoodies. I'll be picking up another one in a different color soon!
Great Sun Shirt! Keeps you cool in the hot sun and dries super quick. No smell. Love it
Generally very satisfied. Feels great against the skin. I used the hoodie as a base layer on the West Highland Way in Scotland. It was always warm enough (depending on the situation, worn with a fleece and a wind layer) and I didn’t overheat, even on climbs. Even after several days, the smell was still tolerable. The hood is very loose-fitting. So I had my local tailor sew on an extra button. It doesn’t look perfect, but it meant the hood stayed on my head even in strong winds. It would be great if Ketl could incorporate this in a future version. A few threads have come loose along one seam after just a few washes. However, I don’t think this will affect how it performs.
Zero smell after a nasty, hot, humid run by a Clydesdale who sweats more than he runs! :] I know merino regulates temps well, but I put this shirt through an unrelenting hot, humid XC practice and recovery run. The shirt was soaked after about 5 minutes and actually helped keep me a little cooler. I am very impressed but how well it performed after that run. I hung it up to dry and a day or two later there was zero sweat smell or stink. I wore it again and had the same results. The shirt is well made and has a great fit and finish. I like the 4-button front as it allowed me to get more airflow when on the move. I am eyeing the No-Fry 4-button next. The easter eggs in random places are a nice touch. Keep up the good work!
This is a great sun hoodie. The weight and thickness is perfect for both warm weather and cooler hikes. I’ve worn it for a multi-day backpacking trip and it has held up great and dries pretty quickly. The only complaint I have is I wish the merino content was a little higher. It is only about 50% and I would prefer it to be more like 75-80. That said, the blend is good and hopefully will hold up for at least a few years.
I bought the merino sun hoodie for my husband and he loves it, especially the front snaps. He also has the synthetic sun hoodie. So far it’s been great for shoulder season hiking and dries fast. No smell so far after a sweaty weekend of hiking!
Ultra comfy in hot and cool weather. Fits as it should and it's my new favorite shirt.
Great shirt. Comfortable and holds up to the elements
Love all of ketlmtns merino gear!
Lightweight, soft, and very breathable. Surprisingly durable so far, too! I have taken this hoodie on three hikes so far and it has held up well. It breathes well and is comfortable to wear. The shirt has shown no signs of pilling in areas under my pack. It also survived a rough brush against tree bark when I fell during a descent (I survived). Overall I’m very happy with the purchase.
Great fit. I love the color of the dust/brown version. Backpack straps won’t leave marks, but the color is light enough that it should absorb too much heat.
Keep in mind, this is thin merino. If you are looking to stay cool but still looking put together enough for lunch out, this is a perfect product.
This is the best Merino Sun Hoodie I have tried yet. It's not so thin that it feels weak, and surprisingly, what I've put it through so far has proved to be quite durable. It's just that perfect weight to wear. It never really feels thick and heavy when it's hot, but also still kind of makes you feel like it's keeping you a little bit warm when it gets cold. Perfect shoulder-season sun hoodie. Also love the Four-Snap design because when it is actually hot, popping all those things open makes a huge difference. Really pumped to see KETL making Merino stuff because all their other stuff is so good.
