Most people think I'm crazy for having over 30 pair of Vibrams ... but that's quite alright, because I love my VFFs! They're all I wear. After buying a pair of the new MRs in Military Green and trying them out, I had to order the other 2 colors (blk/grey & grey/orange) from Moosejaw. I have always found Vibram's Spyridon line to be one of their most, if not the most, comfortable shoes in Vibram's line-up. But this new MR (mud runner) is now my new favorite! All of the Spyridon laced models are a little tougher to put on because the laces are shorter which creates a tighter opening to get your foot through, but the extra effort is definitely worth it! The MR model has a new polyester upper that is more comfortable than previous models which, when combined with their outstanding 4mm thick sole design that incorporates a "rock plate" for extra protection, makes this a must have for the true VFF fan!