Rubber sole. Color way: Pale Ivory/ Shimmer Sail Stretch upper is designed to fit like a second skin. Low foam density lets your foot feel connected to the ground. Heel-to-toe grooves on the outsole and side of the midsole flex to give optimal flexibility with every step. Asymmetrical lacing system is placed on the side to relieve pressure on your instep. These are built for marathon runners. Brand new in original box wo lid.