Stack height progression follows biomechanical data, with anterior-posterior differentials under 2mm, swift 3 running shoes.

The CONTEND 9 GS (Grade School) shoe is designed for young feet. Details like the toe reinforcement, toe rubber stitching, and solid rubber outsole increase durability and lengthen the shoe's lifespan.

Reflective detailing on the heel and vamp increases nighttime visibility by up to 150 meters, best cushioned shoes for distance running.