Quick verdict: The PAKA Sol Hoodie ($99) is a UPF 30+ sun hoodie built around a Royal Alpaca and Tencel blend, and it solves a problem most hikers don’t realize they have — the constant on-again, off-again layer dance on a mountain trail. On Deer Mountain in Rocky Mountain National Park, where you’re in blazing sun one minute and cool pine shade the next, I never once took it off or wished I had. That’s the whole review in a sentence. If you want a single layer that thermoregulates instead of just insulating, this is it.
Here’s the thing about hiking in Colorado that nobody warns you about: the temperature doesn’t change gradually. It changes every time the trail turns.
You step out of the trees into open sun at 9,500 feet and it’s suddenly ten degrees warmer and the UV is brutal. Thirty seconds later you’re back under the canopy and the breeze cuts right through you. Most people manage this by stopping every fifteen minutes to pull a layer on or stuff it back in the pack. I did that for years.
Then I hiked Deer Mountain in the PAKA Sol Hoodie and didn’t touch a zipper the whole way up.
What is the PAKA Sol Hoodie?
The Sol is PAKA’s lightweight sun hoodie — a performance layer built on the same alpaca fiber the brand made its name on, blended for stretch and breathability. Specs:
| Spec | Detail |
|---|---|
| Price | $99 |
| Sun protection | UPF 30+ |
| Fabric | 67% Tencel, 14% Royal Alpaca, 14% Nylon, 5% Spandex |
| Weight | 260g / 9.17 oz (181 gsm) |
| Fit | Regular / relaxed |
| Key features | Three-panel crossover hood, hidden thumbholes, structured stretch |
| Properties | Thermoregulating, odor-resistant, hypoallergenic |
| Layering | Works as a first layer or mid-layer |
| Made in | Peru |
| Care | Machine wash cold, gentle cycle, lay flat to dry |
Worth being precise here, since a lot of coverage glosses over it: this is an alpaca blend, not a 100% alpaca garment. Royal Alpaca makes up 14% of the fabric, with Tencel doing most of the structural work. That blend is the point — you get alpaca’s thermoregulating and odor-resistant properties with the drape, stretch, and softness that make it wearable for twelve hours straight. But if you came looking for a pure alpaca layer, that’s a different product in PAKA’s lineup.
Why alpaca wool actually matters
This is the part worth understanding, because it explains everything about how the hoodie performed.
Alpaca fiber is hollow-core. Unlike sheep’s wool, alpaca fibers have microscopic air pockets running through them. Those pockets do two jobs at once: they trap warm air when it’s cold, and they allow air movement and moisture transfer when it’s hot. That’s what “thermoregulating” actually means at the fiber level — it isn’t marketing language, it’s structural. Alpacas evolved in the Andes, where a single day can swing from freezing to blazing, and the fiber adapted accordingly. Which is a nearly perfect description of a summer day in the Rockies.
It’s warmer than merino, but lighter and more breathable. Those same hollow cores give alpaca a better warmth-to-weight ratio than sheep’s wool, including merino, while breathing more freely. Less bulk, more range.
It’s naturally odor-resistant. Wool fibers resist bacterial growth, and alpaca is exceptional at it. Practically speaking, this hoodie goes multiple hikes between washes without turning on you — a real advantage on a multi-day trip where you’re not doing laundry.
It’s lanolin-free and hypoallergenic. This is the one that converts skeptics. Most people who say “wool makes me itchy” are reacting to lanolin, which alpaca doesn’t have. PAKA uses fine-micron Royal Alpaca, which means it lands somewhere near cashmere on the softness scale. There’s zero scratch here.
It’s a renewable, biodegradable fiber. Alpaca is a natural fiber with a comparatively low environmental footprint, and PAKA is a Certified B Corp that traces its fiber back to origin and works with a network of Peruvian women artisans. If you’re trying to move away from petroleum-based synthetics in your kit, this is a legitimate path.
On trail: Deer Mountain, Rocky Mountain National Park
Deer Mountain is the ideal test for this hoodie, and not by accident — I picked it.
The trail starts at Deer Ridge Junction around 8,900 feet and climbs roughly three miles to a summit just over 10,000 feet. It’s a moderate, steady climb with a series of switchbacks, and what makes it perfect for evaluating a layer is the terrain mix: stretches of shaded ponderosa and lodgepole, then wide-open exposed sections with enormous views back toward Longs Peak and the Mummy Range, then back into the trees. In and out of sun, over and over, for about 1,000 feet of gain.
The exposed sections. At 10,000 feet, UV is roughly 40-45% more intense than at sea level, and the Colorado sun does not negotiate. The UPF 30+ fabric handled the sun load, and the three-panel crossover hood is the design detail that surprised me most — it covers the neck and the sides of the face, which is exactly where a ball cap fails and where I always end up burned. The hidden thumbholes pulled the sleeves over the backs of my hands, another spot I chronically forget to sunscreen. Hood up on the open switchbacks, and I stopped thinking about the sun entirely.
The shaded stretches. This is where a typical synthetic sun hoodie lets you down — it blocks UV but does nothing when the temperature drops, so you’re cold in the trees and shedding it the second you’re back in the sun. The alpaca blend held onto enough warmth in the shade to stay comfortable without ever becoming an oven when I stepped back into the light. That’s the thermoregulation doing its job, and it’s the single most useful thing about this hoodie.
Climbing hard. Working up the switchbacks with an elevated heart rate, it breathed well and moved with me. The stretch is real — reaching, scrambling over a rock step, adjusting pack straps, all fine. The regular/relaxed fit gives you room without flapping.
The bottom line on trail: I put it on at the trailhead and took it off at the truck. In between, I did not think about my clothing once. On a mountain hike, that is the highest possible compliment.
An honest caveat: dry time
The trade for that softness is drying speed. Tencel is a slower-drying fiber than the ultralight nylon and polyester used in most technical sun hoodies. If you sweat through it hard — a hot trail run, a brutal climb in full sun with no breeze — it will hold moisture longer than a paper-thin synthetic.
For a hike like Deer Mountain at a steady pace, it was a non-issue. For high-output efforts in real heat, or a day where you’re likely to get soaked and need to dry fast, a synthetic still wins on that one metric. Everything else, the Sol wins. Know which trade you’re making.
Beyond the trail
It’s worth saying that this doesn’t look like technical gear, which matters more than it sounds. After the hike we grabbed food in Estes Park and I didn’t look like I’d just come off a mountain. The Sol reads as a normal, well-made hoodie — it disappears into a regular wardrobe in a way most sun hoodies, with their glossy synthetic sheen and logo placement, simply don’t. Add the odor resistance and it becomes the obvious one-shirt choice for travel.
Who it’s for
- Buy it if: you hike in variable conditions with a lot of sun-to-shade transitions, you want one layer instead of a system, you value comfort and odor resistance, or wool has historically felt itchy to you.
- Skip it if: you need the fastest-drying option for high-sweat efforts, or you specifically want a 100% alpaca garment.
PAKA Sol Hoodie: the verdict
The best layer is the one you forget you’re wearing. On Deer Mountain — in and out of sun, 1,000 feet of climbing, thin air and swinging temps — the PAKA Sol Hoodie never once asked for my attention. It handled the UV in the open, held warmth in the trees, breathed on the climb, and looked good enough to wear into town afterward.
At $99 it’s priced in line with premium synthetic sun hoodies, but it does something they can’t: it regulates instead of just covering. That comes down to the alpaca, and after a season of wearing it, I’m convinced. It’s the layer I now reach for by default before heading into the park.
FAQ
Is the PAKA Sol Hoodie good for hiking? Yes. Its UPF 30+ rating, crossover hood, and thumbholes handle sun exposure on open trail, while the alpaca blend’s thermoregulating properties keep you comfortable when you move into shade. It performs well as either a first layer or a mid-layer.
What is the PAKA Sol Hoodie made of? 67% Tencel, 14% Royal Alpaca, 14% Nylon, and 5% Spandex. It weighs 260g (9.17 oz) at 181 gsm and is made in Peru.
Is alpaca wool better than merino? For warmth-to-weight and breathability, alpaca has an edge — its hollow-core fibers trap air more efficiently while allowing more airflow. Alpaca is also lanolin-free, so it’s hypoallergenic and doesn’t cause the itch some people get from sheep’s wool. Merino generally dries faster.
Does the Sol Hoodie have sun protection? Yes, it’s rated UPF 30+. The three-panel crossover hood shields the neck and sides of the face, and hidden thumbholes cover the backs of the hands.
Is it odor-resistant? Yes. Alpaca fiber naturally resists odor-causing bacteria, so the hoodie stays fresh across multiple wears — useful for multi-day trips and travel.
How much does the PAKA Sol Hoodie cost? It retails for $99, with free shipping on PAKA orders over $150.
How do you wash it? Machine wash cold with like colors on a gentle cycle. Do not bleach or dry clean. Lay flat to dry.
How long is the Deer Mountain Trail in Rocky Mountain National Park? Deer Mountain is roughly a 6-mile round trip from the Deer Ridge Junction trailhead, climbing about 1,000 feet to a summit just above 10,000 feet. It’s rated moderate, with a mix of shaded forest and exposed switchbacks — which is exactly why it’s a good test of a versatile layer.