Merrell All Out Blaze Sieve

8.6 score
Runnerclick score (8.6)/10

Our overall Runnerclick score is based on 3 different factors: Editor's rating after in-depth testing. User ratings submitted on this page Overall score from the "reviewmeter" based on reviews across the web the weight of each factor is: 40% editor rating 15% user ratings 45% reviewmeter
Editor rating: 8.0 / 10
User's rating: based on 3 user ratings
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Merrell All Out Blaze Sieve Review Facts

At the beach, it’s nice to feel the sand between your toes and the cool water on your feet. But sometimes, your feet require a little extra protection. For conditions and environments where water is a guaranteed factor, a water shoe can keep your feet from getting blistered and injured. The Merrell All Out Blaze Sieve features a sandal-like design with many cutouts to help drain out water. Whether you’re at the lakeside cabin fishing and catching frogs or you’re heading out for a short trail walk on an unusually rainy day, the Sieve ensures you stay dry even in the wettest scenarios. These are the perfect pair of summer sandals for your adventurous lifestyle. 

Editor's Pros & Cons
  • Comfortable
  • Versatile
  • Easy slip-on design
  • Quick-lacing system
  • Quick-drying
  • Drains water easily
  • Outsole could be improved
  • Holes pose a danger on technical trails
See How
Reviews were analyzed here:
We read, analyze and sort reviews into positive & negative categories to give you the complete picture.
What are buyers saying?

We have spent 3 hours analyzing a total of 682 reviews.

These reviews are then categoried into "Positive" and "Negative" feedback.

Below you will read a summary of them:

  • Overall, buyers like the comfort and durability of the Merrell All Out Blaze Sieve. Merrell has created a standard for their shoes and many say this one lives up to their expectations.
  • As a shoe designed for use in wet conditions, buyers praise the All Out Blaze Sieve for its performance while kayaking, fishing, camping, or trekking around waterfalls.
  • It's an easy on, easy off shoe. The bungee cord laces make adjustments quick and simple.
  • The elastic in the heel keeps the shoe in place even when wet.
  • Water drains quickly out of the shoes making it easy to move around in wet conditions.
  • It was noted that the fit of the shoe stays true even after being fully submerged in water, dried, and washed.
  • Not all, but most buyers say the soles have great traction.
  • Reviewers who have had the shoes for an extended period of time say they have held up even after excessive use.
  • Although these are more of a water shoe, many buyers say they are great for light hiking and work.
  • If you want to save packing space when you travel, this is a good option. The All Out Blaze Sieve works as a hiking shoe, water shoe, aren't bulky, and don't require socks.
  • The material on the upper is easy to clean.
  • Holes in the upper help provide some breathability which make these shoes great for warm weather activities.
  • There is a lot of praise for the color options and overall appearance.
  • Very few buyers have needed any break in time for these shoes. Most were comfortable wearing them straight out of the box.
  • The toe design provides more protection than a typical sandal or water shoe.
  • Lightweight design with a snug fit adds comfort and stability.
  • Watershoes can sometimes produce a smell after use, but several buyers noted not noticing any smell developing after wearing these shoes.
  • Many reviewers say the Merrell All Out Blaze Sieve is a great balance of shoe and sandal. They work for a variety of outdoor activities.
  • The most common complaint for the All Out Blaze Sieve is sizing. Some buyers say the fit is too small and narrow. Checking sizing charts before ordering is important since these shoes are designed to be worn without socks.
  • Although the design allows water to drain out easily, small rocks and dirt can get in the shoe. Some say it's easy to get them out without having to remove the shoe, while others had trouble with dirt getting caught in the toe cap.
  • The toe area is more narrow than some other water shoes. This can lead to some pain or rubbing since socks aren't typically worn.
  • The soles of the shoe are flexible, but some buyers complain they are too thin and not protective enough on rocky trails.
  • It takes several hours for these shoes to completely dry after being fully submerged in water.
  • There is a lot of praise for the overall comfort of the shoe, but there isn't adequate arch support for some people.
  • Several people noted issues with stitching quickly loosening in some areas of the shoe. This includes a couple of reports of loose stitches straight out of the box.
  • Due to the tongue design, the top opening of the shoe can feel too tight for some people who prefer a more open design.
  • Although many buyers are satisfied with the traction of the shoes in wet and dry conditions, a small percentage experienced very little to no traction when walking on some slick surfaces. This made the shoe a dangerous choice for them as a water shoe.
The Reviewmeter shows you an overall score that you can easily refer to. The highest rating is 10 (100% positive feedback)
Of the 682 reviews we found in total, 10% were negative, and 90% were positive.


The Sieve’s outsole is made of TC5+ Vibram material and is intended to provide traction on varied terrain. The 3mm lugs jut out from beneath the shoe for extra grip that adds stability. The shoe also features a variety of drainage holes for maximum water shedding.

Users reported that while the lugs perform relatively well, the Vibram brand rubber was less impressive than expected. A number of reviewers found the sole slippery on wet ground, which seems like an oversight for a water shoe. The outsole is not a complete failure, however. It’s fairly grippy but also super durable.


The All Out Blaze includes a UniFly midsole and plenty of holes for water drainage. Despite its sandal-like design, the Sieve has more substantial cushioning than you’d expect. Their midsole padding is good enough for hiking or walking. The drainage holes are intended to shed water and reviewers reported that they helped keep their feet super dry.


The Sieve’s upper features a cut out sandal design for maximum water drainage. The upper itself is composed of waterproof leather. The waterproofing means the material doesn’t hold water. Inside, a Neoprene liner repels water to ensure the shoe stays dry. M Select FRESH material is also included in the shoe to keep bacteria at bay. Where there’s moisture, there’s potential for bacterial growth and nasty smells.

Reviewers were happy with the sizing of the Blaze. The sandal-style makes the shoe easy to slip on and off. Users can adjust the fit with bungee cord laces, though some noted that the upper design and lacing system don’t offer a great deal of support for technical trail conditions. The elastic back of the shoe is convenient, but without a heel counter, overall support is limited. The interior isn’t seamless, and users reported issues with blisters. Going barefoot in these water shoes might not work for everyone.


The shoe’s numerous cutouts shave off some weight, so the overall feel of the Sieve is lightweight. The men’s version of the shoe weighs about 1 pound 5 ounces, and for women, the weight is about 1 pound 1 ounce.



There’s no shortage of ventilation with the All Out Blaze. The reason? Plenty of drainage holes not only shed any excess water still inside the shoe they also help with breathability. Without cutouts, the waterproof leather upper might otherwise hamper air circulation. The interior Neoprene material helps keep the inside dry, too, so you don’t end up with a soaking wet liner. Reviewers agreed that the shoe offered superior breathability and was perfect for wet summer hikes, walks, or hanging around the beach or lake.


For short jaunts in the rain or at the lakeside cabin, the Merrell Blaze is perfectly comfortable. Drainage holes keep water out, a Neoprene liner keeps your feet dry, the fit is true to size, the UniFly midsole offers a bit of cushioning, elastic laces and an elastic back make the shoe easy to wear, and the Sieve is also relatively lightweight. For more extended outings, however, it’s important to note that reviewers did mention issues with blisters. The interior is well lined but not seamless. Despite its breathable, quick-drying design, the shoe is a sandal with cutouts. Water will get in. Even with a water repellent upper and Neoprene interior, it’s impossible to eradicate moisture completely. The combination of bare feet, exposed seams, and wetness will no doubt eventually cause blister problems for some.



Because of its large drainage holes, the All Out Blaze Sieve looks a lot like a beefed up sandal. The water shoe comes in a variety of neutral tones. The design is understated and classic for a versatile summer-style that can be worn casually or for active outdoor pursuits. The men’s version is available in light brown, brindle & butterscotch, and black & wild dove. For women, there’s brown sugar & blue heaven, castle rock, and stucco.


Reviewers reported that the Merrell Sieve was very durable. The only weak spot? The leather upper is prone to fraying. The issue is more a cosmetic one than anything else. Overall, the design is bound to hold up for a fair bit of time. The Neoprene lining, elastic laces, and TC5+ Vibram outsole are all sturdy enough to withstand repeated use over time.



Your feet will stay dry in the All Out Blaze thanks to three anti-water features. The leather upper is waterproof. The Neoprene lining is water repellent and quick drying, and the drainage holes allow any remaining excess water to seep out. Reviewers agreed that the Sieve was ideally suited for wet excursions because of its water-repellent design. The shoe is also intended to be worn on trails. A sturdy TC5+ rubber outsole keeps users sure-footed on technical surfaces, and a toe cap offers front-end protection. Unlike a standard flip-flop style sandal, the Merrell shoe incorporates a UniFly midsole for underfoot protection, too.

Keep in mind that even with the inclusion of a toe cap, the rest of the shoe leaves a whole lot of foot exposed. On gnarly trails, this can pose an injury risk. Be careful, also, when wearing the Sieve in tick-heavy areas. If you do happen to walk through tall grasses or in other tick-laden environments, make sure to check your feet when you get home. If you’re out with your furry walking buddy, don’t forget to check them as well. Ticks can spread Lyme and other diseases.


The Merrell All Out Blaze delivers adequate responsiveness. The UniFly midsole is neither too stiff nor too soft, and the 3mm outsole lugs don’t compromise ground feel.



While the Merrell shoe seems a perfect candidate for rugged conditions, the Sieve’s elastic back, and sandal-like construction isn’t ideal for technical terrain, especially in scenarios that include slippery wet ground. The rear lacks a heel counter, which would typically deliver a combination of stability and support. The elastic laces allow users to adjust the fit, but overall, the sandal-style is less supportive than a regular sneaker design. Reviewers noted that the Sieve was a poor choice for rugged trails because of its lack of support.


While lack of support makes the Sieve a poor choice for intense bouts of activity on rugged off-road terrain, the sandal-like water shoe is a great candidate for non-technical trails with plenty of water obstacles. Water crossings, massive trail splitting puddles, and torrential rain are no match for the All Out Blaze’s cutout design. Large drainage holes allow water to escape the shoe’s interior and Neoprene inside the shoe helps keep things dry. Reviewers agreed that the TC5+ Vibram outsole performed well most of the time, though some found it less than stellar on slick wet surfaces. Otherwise, the Sieve is a great option for hiking or walking around on a rainy day.


Reviewers had no issues with the price of the Merrell Sieve. The cleverly designed water shoe does its job and performs as intended.


The Vibram brand outsole on the All Out Blaze is made of sturdy TC5+ rubber. The thick rubber sole includes 3mm lugs that help provide traction. The water shoe’s textured sole offers reasonable stickiness, but users reported poor performance on slick objects such as wet rocks. Still, the shoe provides relatively good traction for most instances.



Reviewers said that they liked the flexible outsole of the Merrell Blaze. The shoe bends and flexes easily. An elastic back is also flexible and makes it super simple to slip into the water shoe on a moment’s notice.



The Merrell Sieve offers reasonable stability for most wearers and for most conditions. The upper fits well and includes a useful elastic lacing system. The slip-on design, however, also consists of a flexible elastic backing. Without a heel counter, the adjustable rear felt flimsy and unsupportive according to many reviewers. The shoe is not a floppy unstable mess, however. The leather upper offers structural integrity to the lightweight water shoe. The outsole, made of sturdy Vibram brand material, also helps deliver stable footing. The 3mm lugs and TC5+ rubber provide the grip needed underfoot to tackle uneven trails.



The drop height listed for the Merrell water shoe is 8mm. Unlike most sandals, the Sieve is not cushion-free. There is, thankfully, a cushioned layer of UniFly material in the midsole which provides a bit of protection between the user and the ground.
Key Features

Key Features

- Water shoe
- Sandal design with slip-on construction
- TC5+ Vibram outsole provides traction and durability
- 3mm lugs for added grip
- UniFly midsole material for padding underfoot
- Waterproof leather upper helps repel water
- Drainage holes for shedding water
- M Select FRESH anti-microbial liner
- Neoprene interior is water repellent and quick-drying
- Protective toe cap
- 8mm drop
Bottom Line

Bottom Line

For water-based sports, activities, or those who merely tend to walk or hike in waterlogged environments, the Merrell All Out Blaze Sieve is an excellent footwear option. The sandal-like shoe works well for indoor and outdoor pursuits. Merrell simply needs to fix the interior of the shoe to create a blister-free fit and improve the outsole to add a little bit more texture for grip on slick surfaces. The shoe could also be more supportive, but otherwise, it’s a great water shoe.

A few simple fixes are all that’s required for version 2. Overall, the shoe is easy to slip on and kick off. A quick tug on the elastic laces is all that’s needed to tighten the Sieve. A flexible sole makes it easy to navigate on the trails deftly. Built for wet environments, the shoe also features a quick-drying waterproof design with drainage holes to repeal what’s left of the water after you step in a puddle. Breathability is indeed not an issue, and the Sieve also happens to be incredibly durable.

Heading to the beach this summer and looking forward to long walks along the ocean? Excited to go fishing at the cabin? Or maybe you happen to walk your dog on waterlogged trails. The Merrell All Out Sieve will suit your needs for all these scenarios.