There are not two fabric options but styles of the same fabric, TT-1. The two styles of TT-1 are a solid dye twill and a yarn dye denim. The fibers that make TT-1 are 76% Nylon 6,6, 20% Combat Wool, 4% T-400 Lycra.
Solid Dye Twill — No variation in the color of the fabric. The fabric is dyed to a very true and rich.
Yarn Dye Denim — Each of the yarns are dyed and then woven to mimic a true variation of a denim fabric. The fabric has a slub yarn which separates TT-1 from all other technical fabrics, making it a true denim fabric.
Jet Black - 19-0303 TCX
Total Eclipse - 19-4010 TCX
Magnet Gray - 19-3901 TCX