Like others have stated, the Wooly Mammoth is a fun tie. Thick as hell so it pretty much limits its' use to Fall/Winter only.Now the blue-green houndstooth is more versatile. In fact, I just got mine in the mail today. It's wool with a blend of cashmere so it is extremely light weight. The colors are superb. If you can only get one tie between the blue-green houndstooth or the wooly mammoth, go with the houndstooth.Bottom line though, you can't go wrong with either tie.