In my opinion, if you are going to turtle jungle, then build tank. That way you take full advantage of the fact that you are putting those points into turtle early. Also, I highly recommend Madred's Bloodrazor for this build. It allows Udyr to spend his money on wards, seeing as Wriggles+Merc Treads+Bloodrazor gives Udyr enough...everything.....to tide him over into the late game.

Other than that, this is a very solid guide. Nicely formatted and pleasing to the eye. Post a video of your Iron Mantle jungling and prove me wrong! :)

Thank you for your opinion :)

The only problem I have with this guide is the inherent issue with using Iron Mantle primarily. Iron Mantle is a utility spell, that's it. I've tried this style build before, and while I could stay in jungle for a really long time, it was because I never did much damage. His Wilding Claw and Wingborne Storm builds lead to a much more sustained and powerful jungle. Beyond that, Iron Mantle doesn't help at all with ganking. Your ganks are very weak and you're not a threat. Udyr relies on his quick jungle and superb ganks, and this build allows room for neither.