The GT-2000™ 13 running shoe incorporates 3D GUIDANCE SYSTEM™ technology to support foot placement and provide stability. Pure GEL™ technology and FF BLAST™ PLUS foam are integrated to enhance shock absorption and cushioning. 3D guidance system technology Pure GEL technology FF Blast plus technology engineered mesh upper AHARPLUS heel plug rubber AHAR low hardness outsole material Ortho Lite X-30 sockliner small reflective details