Midsole The midsole of this shoe incorporates FF BLAST™ PLUS technology, an enhanced version of FF BLAST™. The ultra-lightweight foam provides excellent cushioning and optimal energy return. Additionally, ASICS' exclusive PureGEL™ technology delivers enhanced comfort and exceptional shock absorption, reducing impact on your joints. This technology ensures comfortable cushioning with every step. Upper The engineered mesh upper offers targeted support in the midfoot and optimal breathability in the forefoot. The OrthoLite X-55 insole provides immediate comfort and lasting cushioning. The perforated outsole keeps your feet cool while running. The heel counter is reinforced, while the top of the heel counter remains flexible, soft, and comfortable. This eliminates pressure on the heel bone.