Merrell SpeedARC Surge BOA

Did you detest the barefoot trend? Wish you could walk on super soft, clouds with built in springs? Seek no more, you have arrived! Merrell created a great trail shoe that challenges the competition for the title of most padded, plush and unconventional-looking trail shoes in the world.

I used to wear big, heavy hiking boots that required the sacrifice of several cattle and required a lengthy break-in process where my feet adapted to my boots, sometimes over years.

I believed that, if I only encased my feet in enough leather, I'd never roll an ankle again. 

I have since changed my mind. Today I see safety in being faster and more nimble. My legs, feet, and ankles have strengthened, and I spend less time stumbling over mixed terrain because wise foot placement is easier. I get to where I'm going faster and I have more time to enjoy my destination. The weight savings protects my body and lets me carry more in my pack. Keep your Limmers if you like them. This is my way. 

The SpeedArc Surge BOA impressed me with their speed, comfort and trail performance. It's funny that they are shown on the manufacturer's website walking around such rugged environments as sidewalks and streets—a waste of their potential. Perhaps they want to appeal to urban users as a lifestyle shoe...to each their own, I guess. Let's dive into these shoes:

Manufacturer Claims and my Response to each

WEIGHT: 14.35oz

DROP: 8mm

LUG: 4mm

STACK: 38-30mm

Mine were about 3/4 of a pound; less than the claims, but I have smaller feet (9 1/2).

SpeedARC™ midsole system

A first-of-its-kind proprietary system of active response coils powered by dual layers of FloatPro+™ supercritical foam and a nylon FlexPlate™ design delivering superior cushioning and 100% more energy return than the leading hiking boot.

The flex plate in the midsole is legit. It protects from trail rocks stabbing your sole and definitely provides a spring in your step; returning some energy back to you as you walk. The cushion was real. My old (almost 50 years old) feet appreciated the protection.  

dual BOA® fit system

The BOA® Fit System delivers a micro-adjustable, precision fit, engineered to perform in the toughest conditions.

I liked this system...mostly. It snugly and instantly wraps your feet in a high tech hug, locking down securely.  My issues are, what happens if they fail? You can't replace them on the trail. To worry about a hypothetical risk may not be worth the headspace.  Other versions of this shoe have standard laces if this is the deal breaker. Also, when seated cross-legged, the knobs push uncomfortably into your feet. Perhaps this will never happen to you, but it was a minor perturbance to me. 

Propulsive flexplate™ technology

Lab-tested and trail-proven, the SpeedARC Surge BOA®'s revolutionary nylon FlexPlate™ technology delivers 100% more energy return than the leading hiking boot, allowing you to hike more and effort less.

It's truly like having a spring assist in your shoes. I'm not really exaggerating. On trail they feel downright bouncy, even though the bounce comes with a slight "squeaky" noise. Merrell also offers this great midsole plate in several other shoes; both low and mid-top. 

floatpro+™ foam cushioning

Powered by two layers of FloatPro+™ supercritical foam, the SpeedARC Surge BOA® offers twice the cushioning with lightweight durability, making each stride as effortless as the last.

Absolutely more cushion for the pushin' here. We're talking gratuitous, in your face booty. Cover your children's eyes, BBL with extra fries. These shoes are half upper, and half marshmallow, squishy soles. 

quantum grip™ outsole

Merrell Quantum Grip™ durable rubber outsole that enables confidence in extreme trail and city sidewalk environments.

Why are they even mentioning sidewalks? These are trail shoes, and good, grippy ones.  The tread aren't SUPER deep but they grip well on scrambly rocks on the trail. The relief cuts reduce weight and add flex as well, a great bonus.

Merrell SpeedARC Surge BOA – Field Review

I’ve put these through real-world abuse—trail running, multiple trips up to Camp Muir (both loaded and light), and general training hikes. The exaggerated styling is hard for me to swallow but their performance keeps them in my pack rotation.

Comfort

These shoes are, without a doubt, made for comfort and it shows with just a look, but looks aren't the whole story. If all they were was pillows with laces, you'd have no lateral stability and that is NOT the case with the Speed Arc shoes. The "bubbles" in the sole wrap around the feet to keep the wearer upright when the terrain goes sideways. A great feature if you're prone to rolling your ankles randomly. 

Compared to mountaineering boots, the SpeedARC Surge BOAs are night and day of course. Many mountaineers, me included wear trail runners on the approach; saving the painful mountaineering boots for where they are strictly necessary.  This works, eliminating numb toes from mountaineering boots and less weight per step--making the approach faster. The approach to and from Camp Muir felt far less punishing, and I finished with feet that weren’t screaming in pain. The cushioning is firm but forgiving, and the flex allows a more natural stride than stiff-soled alpine boots. On the descent, standing glissades were possible with these shoes. 

Fit & Lacing

The BOA lacing system is quick, precise, and great for mid-hike adjustments. After I start hiking in the morning, my feet compress a little, and tightening the shoes only takes a second. That said, it’s not perfect—when sitting cross-legged, the dial placement can dig into your ankle. Still, for on-the-fly tightening or loosening, it beats traditional laces.

Performance on Trail

The tread grips well on everything from dusty switchbacks to volcanic rock. Flex is excellent, allowing for quick, confident movement without feeling unstable under load. They handle steep inclines and descents with no hotspots developing—at least for me.

Breathability & Weather Resistance

These are not waterproof—which is fine if you know it going in. There is a Gore-Tex version that comes with standard laces that looks promising as well of you require waterproofness. Breathability is great, making them a solid warm-weather or dry-climate shoe, but you’ll need gaiters or an alternate option for wet or slushy conditions.

Durability

After two trips up to Camp Muir, each with 5,000 ft elevation gain, and several trail runs, a trip through the washing machine makes the SpeedARC look as good as new. No wear detected.  Between the marshmallows on the soles and the fabric upper, there is also a rand that makes for a good rock guard.

Weight

A comparable shoe, the HOKA Mafate X, is listed at 12.1 ounces so the SpeedARC gives up a couple ounces to the OG of squishy, comfy material. 

Looks

Many readers get angry that this section even exists in a functional trail shoe review. That's fine. You don't need to include it when you write your reviews. 

Let’s be real: these aren’t going to win any beauty contests. They’ve got that big, bulbous, modern trail-shoe aesthetic that only a gear junkie could love. If you care more about function than fashion, you won’t mind.

That being said, I do not condone deliberate unseemliness. I think they went too far with the marshmallow look. Having a guy at Camp Muir congratulate me on "making it" there in "basketball shoes," like I was some jeans-wearing noob, kind of hurt.  

They come in a purple and in an all-white version as well which do a little to soften the grotesque marshmallow look. Of course, ladies have an option made for them as well. 

In this shoe, if you want the performance, you pay for it in style. 

Overall Verdict

Chunky? Yes. Comfortable? Absolutely. They're definitely curvy, but with a great personality. The SpeedARC Surge BOAs won’t replace mountaineering boots in truly technical terrain, but for long approaches, high-mileage days, or training hikes, they deliver a great mix of comfort, grip, and quick adjustability. If you can forgive the looks, they’ll reward you with happy feet at the end of the day.

Background

I've been hiking in trail runners exclusively for over 15 years.