The Luna Oso 2.0 is a barefoot-inspired endurance sandal that is lightweight and minimalist. With a rugged Vibram sole and interwoven webbing reminiscent of some other high-end models, the Oso would appear to be a very sporty sandal. However, most of our testers feel that it falls short of the mark in several metrics—most notably comfort and adjustability. While we were impressed by the name-brand traction and overall ruggedness of this sandal, the rest of the Oso left us wishing that we could get a better fit for total comfort and endurance performance.
If lightweight is your prerogative, but you also want to be comfortable, you'd be better off taking a look at the minimalist yet comfy Xero Z-Trail. Or, go for the Bedrock Cairn Adventure, which features a similar design and superior performance all-around.