LONO Flow 2 Review | Great Option for Lifting and Warm Weather

LONO got their start in the minimalist footwear community with shoes like the Flow and Flow S. For many, these shoes were great options for giving you a super breathable, sock-like fit. While the original Flow models did a good job in the gym, they were lacking at times for dynamic sessions, especially when it came to lateral security.

With the Flow 2, LONO introduced some notable design revisions, adding suede structural overlays, reinforcing the toe cap, and tuning the rubber outsole to provide more protection underfoot. These have all given the 2 a noticeably different feeling compared to the Flow S.

I tested the Flow 2 for strength sessions, metcons, curve treadmill intervals, and warm-weather daily wear. Here is my full breakdown of where this shoe excels and where it starts to fall short.

Who Should Buy the LONO Flow 2?

• Gym Generalists & Hypertrophy Lifters: If your training consists mainly of free weights, machines, moderate dumbbell work, and general fitness, then the Flow 2 will be a solid barefoot shoe option for you.
• Warm-Climate Athletes & Commuters: If you live in hot weather and want a barefoot shoe with maximum airflow that you can comfortably wear with or without socks.
• Athletes Who Hate Fussy Laces: If you want a comfortable, slip-on bootie design that you can tie once, leave alone, and slip on effortlessly. Not going to lie, I can be a lazy lacer and I love the slip-on feel of these.

Who Shouldn’t Buy the LONO Flow 2?

• CrossFit & Agility Athletes: If your training involves heavy lateral cutting, rope climbs, and explosive bounding, the stretchy knit upper will lack the rigidity you need, go with something like the Vivobarefoot Motus Strength 2 or LONO Hype.
• Cold & Wet Climate Residents: If you regularly train or commute in frigid temperatures or wet environments where uninsulated knit uppers leave feet cold and soaked. Options like the LONO Wild or Vivobarefoot Primus Lite IV AW can be good options.
• Athletes Wanting Extreme Midfoot Width: Lifters with very blocky 3E+ midfeet may feel the raised medial rubber sidewall wrapping into their arch. Consider options like the Be Lenka Velocity or Icarus Ascent Gen 2 for this.

Sizing and Fit Suggestions

About My Feet: I have a normal arch/instep and my feet come in at an E/EE width. The length of my left and right foot are consistent with one another, and I size as a true US 10 for most companies’ sizing charts.

The LONO Flow 2 should fit true to size for most lifters and minimalist shoe fans. I have an E to 2E width foot and found my standard US 10 fit consistently, leaving just under a thumb’s width of room at the end of the toe box (see below).

• Narrow to Standard (D-Width) Feet: Go true to size. The knit wraps securely without feeling sloppy.
• Wide Feet (E to 2E-Width): Stick true to size. There is minimal taper through the midfoot and forefoot, and the knit upper provides forgiving stretch across the toes.
• Extra Wide/Blocky Feet (3E+ Width): Try sizing up, but I’d tread with caution. The medial midfoot outsole features a slightly raised rubber sidewall that could cause mild pressure if your midfoot is exceptionally wide or flat.

Performance Assessment

• Best For: Strength and hypertrophy training, gym generalists, warm-weather daily wear, dog walks, and short curve-treadmill running intervals.
• Lifting & Dynamic Threshold: Excellent for moderate dumbbell snatches, cleans, and general free-weight training. Not intended for heavy barbell lunges, heavy clean & jerks, or high-volume CrossFit cutting drills.
• Underfoot Feel: True zero-drop minimalist feel with a slightly thicker, more protective rubber outsole and natural forefoot flex grooves.

Lifting & Strength Work: 8.7/10

For general strength training and hypertrophy-focused bodybuilding work, the Flow 2 performs exceptionally well. Being a true zero-drop minimalist shoe with a flat base, it allows your foot to root into the floor, giving you great ground feedback on deadlifts, squats, and machine work.

The shoe easily accommodates moderate dynamic barbell and dumbbell exercises like cleans and dumbbell snatches. However, if you are pushing heavy walking barbell lunges, heavy clean & jerks, or loads where maximal ankle and lateral foot anchoring are required, the stretchy knit upper will have some give. For everyday gym lifters and coaches who demo movements, it hits a very comfortable sweet spot.

Cross-Training, Metcons & Dynamic Movement: 8.2/10

During conditioning circuits, box jumps, and bodyweight metcons, the Flow 2 is a noticeable upgrade over the Flow and Flow S. The combination of the reinforced medial toe cap and suede overlays along the forefoot prevents your foot from sloppily spilling over the footbed when landing.

With that said, context matters. Because the core chassis is still a flexible knit bootie, it is not built for high-cadence lateral agility drills, hard lateral cuts, or rope climbs. If dynamic multi-directional jumping or CrossFit makes up more than a third or fourth of your weekly programming, you will want a more armored trainer like the LONO Hype.

Short Running Intervals: 8/10

For running, the Flow 2 can easily tackle short warm-up intervals, 400m repeats, or bouts on a curved treadmill. The flexible forefoot flex grooves allow your feet to articulate naturally, and the slightly beefier outsole rubber takes the bite out of firm surfaces.

However, this is not a shoe intended for high-mileage road running. If you are logging multiple miles at a time in minimalist footwear, you will likely want an upper with considerably more mechanical lockdown and heel cup structure to keep your gait cycle aligned over longer distances.

Daily Wear & Walking: 9/10

As a daily driver, the Flow 2 shines. The sock-like knit upper hugs the instep without creating any of the harsh top-of-foot pressure points often experienced during the break-in period of stiffer knit trainers (like the Vivobarefoot Primus Lite Knit). You can dial in the laces once, slip them on hands-free, and go about your day.

The primary limitation for daily wear comes down to weather. The knit is so porous and ventilated that it is tailor-made for warm climates and hot summer days. If you try to commute in freezing, frigid weather or trek through rain and wet slush, the upper will let moisture and cold air straight through to your socks.

The Performance Takeaway

The LONO Flow 2 is a clear step forward for the Flow line, acting like a refined “big brother” to the original Flow and Flow S. It retains the signature, effortless sock-like slip-on design that requires virtually zero lace fussing, while the added suede overlays and built-out medial toe bumper clean up excessive lateral foot spillover during moderate training.

If you are a gym generalist who prioritizes strength and hypertrophy training, coaches on your feet, or wants a super breathable, comfortable minimalist shoe for warm-weather walking and casual errands, the Flow 2 is an easy shoe to love.

Construction Details

Upper

The upper is built from an ultra-breathable, flexible knit material arranged in a seamless, bootie-style silhouette. It features an anchor eyelet at the bottom with three core eyelets moving up the instep, creating an easy slip-on layout that eliminates tongue bite.

To boost durability and lateral containment, LONO added a reinforced TPU toe bumper on the medial forefoot along with strategic suede overlays along the medial and lateral perimeters. An external pull tab sits at the rear collar to aid in pulling the shoe on.

Midsole & Ground Feel

In true barefoot fashion, the Flow 2 features a zero-drop platform with no traditional foam midsole, keeping your foot completely flat and low to the ground. The underfoot experience is direct and responsive, maximizing sensory feedback without excessive cushioning.

Outsole

The outsole uses a flat, durable rubber compound that is slightly thicker than previous Flow models, enhancing underfoot puncture resistance on urban pavement.

Forefoot and midfoot flex grooves run horizontally across the tread, ensuring natural foot flexion through terminal stance while keeping the overall platform lightweight and flexible.

Final Remarks

The LONO Flow 2 is a very successful evolution of LONO’s sock-like footwear concept. By reinforcing high-wear zones with suede overlays and a reinforced toe cap, LONO delivered a shoe that keeps the breathability and relaxed comfort of the original Flow while adding the structural integrity needed for gym performance.

It works exceptionally well as a daily driver, warm-weather walking shoe, and general strength-training shoe that you can slip on and forget about.

If you have additional questions about how the LONO Flow 2 fits, handles specific gym lifts, or compares to other minimalist trainers like the LONO Hype, drop a comment below!