Shop Soul Naturalizer Kacy Slip-on Flats online at Macys.com. Make way for this loafer from Soul. Luxurious by design, bring exceptional charm to your favorite occasions. Leather, suede or manmade upper with a round toe. All-Thru comfort: soft foam lining, arch support with memory foam, antimicrobial sock lining, lightweight and flexible outsole with traction. 0.5 heel. Consciously packaged: 100% of our shoe boxes are made of 80% recycled paper and soy-based ink.