The Nitro is high-performance bouldering shoe from Ocun. It's low-volume, sticky, and hugs your foot to give you maximum performance whether climbing indoors or on rock.
Are you sure it's a 1.5mm sole? I'm sure this would've warranted more comment - I can't think of any climbing shoes with a thinner sole than 3mm? Ocun's website says it's 4mm, which is more realistic.
Hi Nutty, you're right - it's 4mm. The 1.5mm was a typo after noting that the Nitros use Ocun's CAT 1.5 rubber. Thanks for pointing it out, I have now amended it.