As much as I like 100% Merino wool products, this were a "must buy." I picked them up last week on SAC for $33. I tried them on and they're very comfortable. The "bilayer" material is interesting and is blue on the outside and black, fro the polypropylene on the inside. I I'm 6'2" athletic build and I have some big ol' soccer legs. They're pretty snug, but not to the point of preventing circulation. I'm looking forward to trying them out and will update this post after doing so. The only reason I've given them 4 stars is due to them not being 100% Merino Wool.