per Bally description...
Made in a Reverse Goodyear construction, a highly skilled handcraft technique, the Plizard slip-on Derby shoes in brown feature an elasticated back and are constructed from a soft grained leather, allowing them to be easily folded when traveling. A rubber-injected leather sole provides extra grip.
Grained calf leather
Rubber-injected leather sole
Lace-up fastening
Slip-on construction
Elasticated rear
Bally Stripe rear pull tab