2D-FS - delivers enhanced support, responsiveness, lateral stability and control in the forefoot of the shoe
		
DF2 - provides cushioned court feel, yielding compromise between comfort and quick performance (DF2 = HT Drop 9mm)
		
Duralast - consists of high-density, consummately durable rubber compound that provides abrasion resistance and maximum traction on all surfaces
		
R-DST+ - offers the best combination of cushioning and rebound for more dynamic performance