Diesel D-Throuper CB Black Ankle Boots. Diesel D-Throuper CB Y02022 PS994 T8013 Boots. 100% Leather Upper. Lace Fasten With Zip Opening. Chelsea Boot In Aged Leather. Style -Y02022 PS994 T8013. These boots feature a full leather upper for durability and a premium feel. They have a convenient lace fastening combined with a zip opening for easy on and off. The Chelsea boot design is enhanced by aged leather detailing, giving them a stylish, worn-in look. The model number for this boot is Y02022 PS994 T8013.