Synthetic-and-mesh Made in the USA or Imported Rubber sole Flexion Fit Upper: Proprietary upper which provides form fitting comfort without sacrificing support. PGuard Toe Protector: Enhanced toe durability. DYNAWRAP Technology: Enables better midfoot stability by keeping the foot centered on the shoe's platform. AHAR Plus Outsole: Strategically positioned in critical areas of the outsole, this exceptionally durable compound is 50% more durable than standard ASICS High Abrasion Rubber. Trusstic System technology: Reduces the weight of the sole unit while retaining the structural integrity of the shoe.