Oso 2.0

Size Guide

Oso 2.0 Specs

Made in Seattle, USA.
Weight: 9.2 oz (single sandal, men's size 9)
Thickness: 13MM base + 4.5MM lugs
Sole: Non-Marking Vibram® Megagrip Outsole + Vibram® Midsole
Footbed: MGT (Monkey Grip Technology)
Laces: Performance Laces 2.0 *Patented 
Vegan: Yes

LUNA Sandals - Vibram MegagripLUNA SandalsLUNA Sandals - Seattle Made

Having honed the art of crafting trail sandals for years, we’ve combined all the best qualities into the Oso 2.0. It’s super aggressive, flexible, durable, grippy, and comfortable. From the epic and gnarly to the mellow and easy, the Oso 2.0 will keep you securely planted to the world in whatever terrain you find yourself exploring.

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Customer Reviews

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Glenn K.
United States

First timer.

My first time to run in them. The right foot offered no problems. The left not so much. The strap edges between the toes folded away from the skin on the right foot...the left foot not so much. The strap edges on the left folded in toward the skin and rubbed the skin. I was able to reset it but with difficulty. And it continues to require adjustment. But I think I have it solved.

Glenn K. verified customer review of Oso 2.0
marinko m.
United States

long time

Hi , my name is Marinko I am from Croatia europe. It is litle problem to get your luna sandals here in croatia so I ordered it on my cousin adress in Ohio and now he send me a par . Iam so happy with luna mono 2.0. but they are very very soft and quickly become thin!!! now I will se with oso 20 I think they are more durable!!

United States

great customer service

I had to exchange for a different size and the experience was excellent. I haven't worn them much because it is winter but can't wait to take them on my next warm vacation.


Just completed a tough 53K trail race with Oso 2.0

Having completed a full training season and a tough 53k trail race in extremely muddy and slippery terrain and steep slopes, I can say that i was fully satisfied with the grip of the Oso 2.0 and the fact they remain firmly in place throghout the race. I can now say these sandals are trustworthy!


Missing my Mono 1.0's

I've been wearing my original Mono's for 2-3 years. Love them but the sole is shot and has no traction. Upon recommendations for a Luna that will work well in the desert sands and trail, I purchased the Oso 2.0. I'm not a runner anymore but use these as all around day to day use around the property and desert hikes. I was so excited to get them out of the box only to be equally disappointed when I put them on. For a minimalist sandal, I feel that Oso 2.0 with the performance laces isn't so minimal (and there are plenty of better options out there for 'not-so-minimal sandals). The Vibram sole gets an A+. Midsole is too stiff, getting a C. For a midsole as thick as it is I hoped the sandal wouldn't be so rigid (D). Ok so my foot is protected but when I walk I'm catching my toe as the sandal isn't flexing. I been into Minimalist shoes since before five fingers and these are the stiffest I've experienced. Ok, now for the performance laces. Luna, if you are reading this, when you perfect something, stop. I prefer the original performance laces (A+) with the minimal heel strap. To me, these Oso 2.0's miss the mark. Quality is there (A+), so I've got to give Luna that, just not into the 'improvements'.

LUNA Sizing
Once you've determined your size, you can double check it by clicking the corresponding Printer Iconand printing out a template.
When printing our copyrighted PDF templates, make sure the "Scale" in the Print Window is set to 100% or the template won't be accurate.
If using the Chrome browser, make sure the "Fit to page" checkbox is UNCHECKED.
After you print out the template, also double check the scale by comparing a ruler to the ruler that prints on the template.
Toes should be close to edge, but not hang over. Want our opinion? Send a photo of your foot on the template support@lunasandals.com
The biggest issue people have is not having the template accurately printed, so double check twice. ;-)


(Centimeters) Your Foot LUNA Mens LUNA Womens the actual width of our sandal in centimeters Print
21.9 - 22.2 4 6 9.2 Printer-icon
22.3 - 22.6 4.5 6.5 9.4 Printer-icon
22.7 - 23 5 7 9.6 Printer-icon
23.1 - 23.5 5.5 7.5 9.8 Printer-icon
23.6 - 23.9 6 8 10 Printer-icon
24.0 - 24.3 6.5 8.5 10.2 Printer-icon
24.4 - 24.7 7 9 10.4 Printer-icon
24.8 - 25.2 7.5 9.5 10.55 Printer-icon
25.3 - 25.6 8 10 10.7 Printer-icon
25.7 - 26.0 8.5 10.5 10.85 Printer-icon
26.1 - 26.4 9 11 11 Printer-icon
26.5 - 26.8 9.5 11.5 11.15 Printer-icon
26.9 - 27.3 10 12 11.35 Printer-icon
27.4 - 27.7 10.5 12.5 11.5 Printer-icon
27.8 - 28.1 11 13 11.7 Printer-icon
28.2 - 28.5 11.5 13.5 11.85 Printer-icon
28.6 - 29.0 12 14 12 Printer-icon
29.1 - 29.4 12.5 14.5 12.2 Printer-icon
29.5 - 30.1 13 15 12.4 Printer-icon


LUNAcito Sizes

Length LUNAcito Sizes Print
19cm K12
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