Merrell Morphlite review

After testing the Merrell Morphlite, we believe it’s a solid pick for:

• Runners seeking a lightweight, versatile shoe with a stable platform—perfect for transitioning seamlessly between roads and light trails.
• Those prioritising low weight over long-term durability.
• Anyone seeking a high-drop shoe that handle easy trails and occasional road runs.

The Merrell Morphlite features a significantly higher heel-to-toe drop than advertised, which we believe makes it a bad pick for forefoot and midfoot strikers. In our view, alternatives like the Hoka Challenger 7 or Saucony Peregrine 14 offer a better running experience for these running styles.

Additionally, we found the Morphlite’s durability to be subpar, making it a less appealing choice for those who prioritise long-lasting shoes. For runners concerned about longevity, we recommend the Nike Pegasus Trail 5, another road-to-trail shoe that not only excels in durability but also boasts a superior ReactX midsole for enhanced performance.

Merrell is a brand that traditionally avoids maximalist designs, though we’ve noticed a gradual shift in recent releases. This is a good example, as the Morphlite features a heel height of 32.3 mm—an endurance-friendly yet still manageable stack.

On the flip side, the forefoot feels quite thin. We were surprised after cutting the shoe in half, as it appears taller due to the midsole sidewalls designed for added stability. However, we measured just 21.3 mm in the forefoot.

With even basic math skills, you’d notice the drop measures precisely 11.0 mm. In our view, this is quite high for a trail shoe, making it better suited for heel strikers or runners who favour this geometry. But it’s certainly not for everyone.

We also noticed that the Morphlite features prominent arch support, which visually amplifies the already steep drop. From our perspective, this design makes it an excellent choice for runners needing high-arch shoes or dealing with conditions that require excellent support like plantar fasciitis.

It's also worth noting that Merrell claims this shoe has a 6 mm drop, but that’s clearly not accurate. Even without measuring with callipers like we did, it’s easy to see the offset is noticeably larger.

The midsole stands out as impressive for the reasonable price of the Morphlite. It features Merrell's FloatPro EVA foam, which we’ve seen in other models like the Agility Peak 5, and it doesn’t disappoint here.

After pressing our Shore A durometer into the foam, we recorded a 19.3 HA score. This matches our impressions from testing—offering a comfortable ride that, in fact, feels softer than many other trail shoes. It does a good job at walking too. Overall, it's a reliable pick for budget-minded runners who prioritise affordability over energy return.

We can picture hikers and runners taking the Morphlite on winter adventures, making this test particularly relevant.

After freezing the shoe for 20 minutes, we discovered that the FloatPro midsole resisted well, registering a post-freeze durometer score of 23.4 HA—a 21.5% change that's awesome for an EVA-based foam.

The Morphlite's EVA insole stands out with its impressive 6.1 mm thickness, offering plush cushioning while being 50% made from recycled materials. That's a feature we always appreciate!

One of our biggest concerns before testing the Morphlite in the lab was its fit. In previous Merrell models, we often wished for more spaciousness in the toebox—both in width and vertical height.

Fortunately, we found the Morphlite far more accommodating than its predecessors, which came as a huge relief. Vertical room allowed for natural toe movement without restriction, while the widest part of the upper measured a comfortable 99.1 mm. Additionally, the availability of a Wide size option adds an extra layer of versatility.

While the updated toebox shape clearly enhances comfort for a wider range of users, our second measurement showed it remains moderately tapered. At 77.6 mm, it’s not uncomfortable, but don’t expect a truly foot-shaped design.

If you’re looking for a foot-shaped toebox—and don't mind about using a zero-drop shoe—the Altra Outroad 3 is a much better choice.

The Morphlite doesn’t radiate stability but performs well for neutral runners, thanks to its raised midsole sidewalls that effectively center the foot. However, the jacquard upper feels more like a road shoe, lacking reinforcements to manage uneven terrain.

One reason this shoe feels surprisingly stable is its unexpected torsional rigidity. In our testing, we rated it 4/5—a notably high score for a shoe with moderate stack height and no embedded plate.

The surprises didn’t stop there—we also didn’t expect a 2/5 heel counter. While this slightly reduces heel stability, it makes the shoe exceptionally comfortable for day-long hikes, remaining unobtrusive and free from discomfort.

We initially expected a higher stack height and a wider toebox, likely because the Morphlite appears quite large.

Our digital callipers confirmed this impression, measuring 118.8 mm in the forefoot—a notably broad platform that contributes to the high torsional rigidity we discovered, and that also delivers a stable feel when landing with this area of the shoe.

Our testing revealed a truly jaw-dropping result in the heel. Measuring an expansive 98.8 mm, combined with its steep heel-to-toe drop, this shoe is perfectly tailored for heel strikers. The rounded, broad design of the heel offers superb support and exceptional stability for this group of runners.

In our 90-degree bend test, we discovered its impressive flexibility—requiring just 20.3N of force to flex. This ultra-adaptable design highlights its potential for both hiking and walking, making it a reliable one-shoe option for travel.

At Merrell HQ, they must be all about staying lean, because the Morphlite’s weight-loss program was a huge success. At just 8.4 oz (237g), it’s among the lightest trail shoes we’ve tested—especially impressive considering its broad dimensions!

The Morphlite is a road-to-trail shoe—a hybrid design blending features from both categories to maximise versatility and benefits. Typically, brands opt for a trail-ready outsole paired with a road-inspired upper for enhanced ventilation and comfort.

However, the Morphlite presents a mixed experience. While it avoids heavy overlays and protective features typical of trail shoes, its jacquard upper falls short on breathability when compared to road shoes. After running our smoke test, we gave it a lower-than-average 3/5.

Despite being riddled with ventilation holes, the upper includes a secondary layer beneath the primary white mesh.

This added layer significantly hinders airflow, which we confirmed under the microscope. Although this likely boosts durability, it detracts from ventilation. In other words—it’s better suited for mild or cold temperatures and less ideal for the hottest days of the year.

The upper is not plush or heavily padded, and that reflects its lightweight build. It offers a slight stretchiness, which we found beneficial for comfort. 

Moreover, the quality stands out for its price, and here comes another bonus: it’s entirely crafted from recycled materials, including the laces.

In our initial Dremel test, we found that the jacquard fabric lacked durability, earning a modest 2/5. This result emphasises the critical role of the secondary layer beneath the main fabric, and maybe losing a bit of airflow ends up being a good idea...

Moving the Dremel to the heel, we discovered a disappointing performance, with a 2/5 score leaving considerable room for improvement.

Fortunately, the shoe grips securely around the heel, and that reduces potential rubbing, but the underwhelming durability remains a notable concern.

Merrell often equips its shoes with Vibram outsoles, but at a £100 price point, we knew that wasn’t going to be the case with the Morphlite. Instead, we tested a Merrell-manufactured rubber, which measured 88.1 HC on the Shore C scale.

In our view, this isn’t a world-class outsole—nor could it be at this budget. Merrell aimed for something budget-friendly yet functional, and the grip performed adequately on both roads and light trails. However, we found the rubber coverage sparse, which helps explain how this shoe remains so impressively lightweight.

In our experience here in the lab, hard rubber often performs well against our Dremel, but that wasn’t the case here. After testing the outsole, we measured 1.4 mm of damage—falling short of expectations for long-term wear.

We found this result surprising given the firm formulation of the rubber, which usually holds up better under pressure. For runners prioritising a rugged and long-lasting outsole, this level of wear might be concerning.

Merrell’s focus on making the Morphlite exceptionally lightweight is clear, as we measured just 1.8 mm of rubber—excluding the lugs—on the outsole. However, this slim design makes it better suited for occasional road use compared to other door-to-trail shoes.

Most door-to-trail shoes typically feature lugs between 2.5 and 3.5 mm, but the Morphlite stands out with its 2.0-mm lugs, making it more suitable for ultra-smooth trails or gravel roads with minimal challenges.

In fact, Merrell claims that these lugs work equally well on a variety of surfaces—grass, asphalt, or dry ground. From our testing, we confirm that this means the Morphlite isn’t ideal for moderate or rough trails, but it serves everywhere else.

For its retail price, the Morphlite delivers a blend of features that, in our view, outshines most shoes in its category. While its durability falls short, its budget-friendly price and lightweight design make it a nice option for those less concerned about long-term wear.

While the Morphlite boasts many great features for its MSRP, it lacks reflective elements—a key detail we believe is essential for a door-to-trail shoe.

We discovered a thoughtful addition to the tongue—a loop designed to keep laces securely in place during runs. This practical feature is often overlooked in many designs. We also appreciated the inclusion of an extra eyelet, which enhances ankle security and allows for a customizable fit.

In our testing, the tongue showcased a well-balanced 5.3 mm thickness. This design achieves an excellent combination of lightweight comfort and sufficient padding, making it ideal for the Morphlite.

The tongue is fully gusseted—a usual feature in trail running shoes. However, not every budget-friendly model includes this. Kudos to Merrell for adding it to the Morphlite, as it prevents debris entry and enhances lockdown.

While most trail running shoes come with finger-loop heel tabs, Merrell took a different route by opting for a pull tab that's integrated in the heel counter. It may not appear as trail-focused, but it looks stylish and is easy to grab.

You can remove the perforated insole and replace it with a third-party option, but doing so means missing out on one of this shoe's cool features! However, those needing extra room in the upper can achieve greater comfort by swapping this one out, as it’s noticeably thick.