This saddle is the S-Series S-CH Dressage (Moveable Block) model. The S-Series is Kent & Masters' premium line, featuring higher-grade leather, a slightly more forward-cut flap, and a more streamlined panel design than their standard original line.   This saddle features an interchangeable gullet system and uses type R (long) style bars.  This saddle is set for a medium- wide tree (Blue Gullet bar) and measures 5".  This saddle is 100% British wool flocked which is great to adjust the saddle to your horses measurements.