855-586-2726  

WE MAKE ALL LUNAs TO ORDER! 
CURRENT PRODUCTION TIME IS 3-7 BUSINESS DAYS.  

Sandal Picker

Search

Search

    FREE US SHIPPING WITH ORDERS OVER $105!

    WE MADE MORE THAN 200,000 FEET HAPPY. IT IS YOUR TURN!

    232 reviews

    Retro Oso Flaco

    Size Guide
    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. ;-)

    ADULT SIZES

    (Centimeters) Your Foot Mens US Womens US EU UK actual width in centimeters Print
    21.9 - 22.2 4 6 36 3 9.2 Printer-icon
    22.3 - 22.6 4.5 6.5 36.5 3.5 9.4 Printer-icon
    22.7 - 23 5 7 37 4 9.6 Printer-icon
    23.1 - 23.5 5.5 7.5 37.5 4.5 9.8 Printer-icon
    23.6 - 23.9 6 8 38 5 10 Printer-icon
    24.0 - 24.3 6.5 8.5 38.5 5.5 10.2 Printer-icon
    24.4 - 24.7 7 9 39 6 10.4 Printer-icon
    24.8 - 25.2 7.5 9.5 39.5 6.5 10.55 Printer-icon
    25.3 - 25.6 8 10 40 7 10.7 Printer-icon
    25.7 - 26.0 8.5 10.5 40.5 7.5 10.85 Printer-icon
    26.1 - 26.4 9 11 41 8 11 Printer-icon
    26.5 - 26.8 9.5 11.5 41.5 8.5 11.15 Printer-icon
    26.9 - 27.3 10 12 42 9 11.35 Printer-icon
    27.4 - 27.7 10.5 12.5 42.5 9.5 11.5 Printer-icon
    27.8 - 28.1 11 13 43 10 11.7 Printer-icon
    28.2 - 28.5 11.5 13.5 43.5 10.5 11.85 Printer-icon
    28.6 - 29.0 12 14 44 11 12 Printer-icon
    29.1 - 29.4 12.5 14.5 44.5 11.5 12.2 Printer-icon
    29.5 - 30.1 13 15 45 12 12.4 Printer-icon

     

    LUNAcito Sizes

    Length LUNAcito Sizes Print
    19cm K12
     >>View Template
    Printer-icon
    19.8cm
    K13
     >>View Template
    Printer-icon
    20.6cm
    K1
     >>View Template
    Printer-icon
    21.5cm
    K2
     >>View Template
    Printer-icon
    22.4cm
    K3
     >>View Template
    Printer-icon
    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. ;-)

    ADULT SIZES

    (Centimeters) Your Foot Mens US Womens US EU UK actual width in centimeters Print
    21.9 - 22.2 4 6 36 3 9.2 Printer-icon
    22.3 - 22.6 4.5 6.5 36.5 3.5 9.4 Printer-icon
    22.7 - 23 5 7 37 4 9.6 Printer-icon
    23.1 - 23.5 5.5 7.5 37.5 4.5 9.8 Printer-icon
    23.6 - 23.9 6 8 38 5 10 Printer-icon
    24.0 - 24.3 6.5 8.5 38.5 5.5 10.2 Printer-icon
    24.4 - 24.7 7 9 39 6 10.4 Printer-icon
    24.8 - 25.2 7.5 9.5 39.5 6.5 10.55 Printer-icon
    25.3 - 25.6 8 10 40 7 10.7 Printer-icon
    25.7 - 26.0 8.5 10.5 40.5 7.5 10.85 Printer-icon
    26.1 - 26.4 9 11 41 8 11 Printer-icon
    26.5 - 26.8 9.5 11.5 41.5 8.5 11.15 Printer-icon
    26.9 - 27.3 10 12 42 9 11.35 Printer-icon
    27.4 - 27.7 10.5 12.5 42.5 9.5 11.5 Printer-icon
    27.8 - 28.1 11 13 43 10 11.7 Printer-icon
    28.2 - 28.5 11.5 13.5 43.5 10.5 11.85 Printer-icon
    28.6 - 29.0 12 14 44 11 12 Printer-icon
    29.1 - 29.4 12.5 14.5 44.5 11.5 12.2 Printer-icon
    29.5 - 30.1 13 15 45 12 12.4 Printer-icon

     

    LUNAcito Sizes

    Length LUNAcito Sizes Print
    19cm K12
     >>View Template
    Printer-icon
    19.8cm
    K13
     >>View Template
    Printer-icon
    20.6cm
    K1
     >>View Template
    Printer-icon
    21.5cm
    K2
     >>View Template
    Printer-icon
    22.4cm
    K3
     >>View Template
    Printer-icon

    Retro Oso Flaco Specs
    Made in Seattle, USA.
    Weight: 7.2 oz (single sandal, men's size 9)
    Thickness: 7MM base + 4.5MM lugs
    Sole Waterproof Non-Marking  Vibram® Megagrip Outsole + Vibram® Midsole
    Laces: Performance Laces 2.0 with Tech Straps *Patented
    Vegan: Yes

    LUNA Sandals - Vibram MegagripLUNA SandalsLUNA Sandals - Seattle Made

    Back by popular demand! The Oso Flaco represents the “bear” essentials for a truly trail worthy sandal. This sandal is for those who want the most aggressive tread pattern for crazy grip with our original lacing system along with the super flexibility, full ground feel and the greatest durability possible. It's back!



    Customer Reviews
    4.6 Based on 232 Reviews
    Write a Review Ask a Question
    • Reviews
    • Questions

    Thank you for submitting a review!

    Your input is very much appreciated. Share it with your friends so they can enjoy it too!

    Filter Reviews:
      AC
      07/27/2020
      Abigail C.
      United States United States
      Retro Oso Flaco

      I love, love these sandals. I bought them for city running but they are my go to everyday shoes. My experience with Luna has been great. They helped me find the sandal that best works for my situation. I initially bought a size too small but the hassle free return policy with paid shipping made this very easy. This is a great company and a great sandal.

      A
      07/24/2020
      Anonymous
      United States United States
      Love them!

      These are great sandals for everything. I run, hike, walk around, and use them for everyday tasks. Love them!

      IS
      07/21/2020
      Isaac S.
      United States United States
      Perfect

      Third pair of lunas and these are what I was always looking for in sandals. I had the velcro mono originally, then the oso flaco winged (my dog got them) and now these. I am probably going to just buy a new pair of these whenever I run these ones out. And then another and another. Velcro all the way baby.

      NH
      07/19/2020
      naali h.
      Canada Canada
      Great grip!

      I wore the same pair of the Leadville Trail sandals for the last 5 years, until they had holes in the soles. I loved that the Leadville Trail felt like not having anything on my feet, as they formed to my feet, but although the Retro Oso Flaco is a little heavier and doesn't form to my feet to the same extent, they feel more protective for my feet in an urban environment. They also have superior grip on rocks and slippery surfaces. I do trip on the ends of them sometimes, because they are flat and not curled up, formed to my feet - but this is just something I need to adjust for, with my gait. I will definitely order another Leadville Trail, in addition to these Retro Oso Flacos, for when I am not in an urban landscape.

      ZG
      07/09/2020
      zackory G.
      United States United States
      Never gong back to traditional shoes!

      After 2 months of wear and 200 miles on and off pavement, running in my traditional shoes feels foreign and wrong. I have struggled with IT Band pain for years (despite trying numerous shoe types, PT, stretching, etc.). Since switching to LUNA the pain has left and never returned.