When evaluating sneakers, focus on the Upper Material, Midsole Technology, and Outsole Durability. For performance footwear, ensure the use of breathable fly-knit or genuine leather for the upper. The midsole should feature EVA, TPU, or PU foam for optimal shock absorption. For the outsole, RB (Rubber) with high abrasion resistance is essential to ensure a long product lifecycle. Always request a technical spec sheet that details the bonding strength (typically >3.0kg/cm) to prevent sole separation.