Nike shox R4/R5series for man is named from the heel cushioning suspension.(Shox meaning shock absorber).This system over the past 20 years,Nike has been using the air-cushion system,compared to be called a technical leap forward.With the same as the spring made of elastic foam four column,the new athletic shoes not only have the cushioning effect,but also to provide thrust.In 1997, researchers in the folder between two layers of flexible plastic plate into the vertical flexible column. This design is a key material used in the automotive manufacturing industry and the newly developed amino acid ethyl foam. This foam if the fall will be high on the surface of a hard bounce. In fact, this is the Shox series of sports shoes behind the design concept: flexible column against external shocks and compression, and then when they restore the original height, the outbreak of the repulsive force will push forward the wearer. This design concept in the design of running shoes were on its head.

Shox running shoes had an approximately 2.5 cm high four flexible columns, forming a square matrix, which for the wearer to provide a strong elastic. When the basketball players in the field to conduct high-intensity exercise, Shox shoes enough flexibility in the performance of a stable column. So the researchers shortened the length of the pillars, carved in its plus scratches on the inside so that they can be under pressure to the inside bend, but also reinforced the top and bottom of the liner, and an increase in the back of a shoe to connect two layer lining of the belt.