Casual and comfy, the Freya Canvas Trainer features a flat cotton lace up fastening for a secure fit in addition to a memory foam comfort insole to keep feet happy throughout the day. Upper & Lining: Textile Sole: Rubber Heel height approx. 6.5 cm. The Freya Canvas Trainer features a flat cotton lace up fastening for a secure fit in addition to a memory foam comfort insole to keep feet happy throughout the day.