Ryka Echo Knit Womens Slip On Sneakers Size 8.5 Ryka Echo Knit slip-on sneakers in a versatile olive green hue offer a blend of comfort and modern style. Breathable ribbed knit upper that conforms to the foot, paired with a RE-ZORB LITE midsole for lightweight impact protection and shock absorption. Anatomical insole provides extra arch and heel support, while the durable rubber outsole with a wavy traction pattern ensures stability on various surfaces. Designed with a convenient pull tab at the heel and a sleek, low-profile silhouette