Purchased in June 2025 from a select shop. Used for about 3 hours. Purchase price: ¥23,100 The following is an excerpt from the product description on pg's EC site: pg's new EMPTY. These are adjustable clog-type sandals. They have a double-layer construction. The outer layer (outer) is cow suede (cowhide), and the inner layer (inner) is made of neoprene. They use the FREELOCK system, and by turning the dial, the inner layer tightens, allowing for adjustment according to your purpose and use. When moving actively, they hold your feet securely for easy movement, and when sitting and resting during long periods of travel, you can loosen them for relaxation. The sole uses a vibram® crepe sole-style sole. This sole gives the sandals an authentic feel. The EMPTY is a next-generation sandal that is functional while also having a traditional side.