Constructed with comfort and breathability in mind, the upper features a softer engineered mesh design for long runs. Engineered eyelet shaping helps the upper move more naturally with the foot, while a stretchy midfoot panel appropriately hugs the foot to generate better flexibility. Providing the runner with excellent shock absorption and softness, the GEL-NIMBUS™ 23 delivers more compression in the heel thanks to its softer GEL™ technology cushioning unit and contoured design lines. Also, a gender-specific TRUSSTIC™ device provides an articulated amount of support in the right direction for men and women to help generate a smooth transition. Under the toe, the inclusion of gender-specific pillars help cushion the body and help runners experience a softer feel. Simultaneously, the ORTHOLITE™ X-55 sockliner equips runners with a forgiving, yet responsive stride.