These KEEN sandals are easy to use. I used them for two seasons, 2024 and 2025. However, I only used them at the beach and in rivers, so I think the total number of days I used them was about 10-15 days. I actually bought them intending to use them daily, but I prefer sneakers and didn't wear them much, haha. Therefore, I think the rubber grooves are still in good condition. I am also selling a similar KEEN sandal (different model) in 21cm separately. It is possible to sell them as a set. - Brand: KEEN - Color: Multicolor - Style: Outdoor Sandals - Sole Material: Rubber - Size: 22.5cm Thank you for looking. Thank you!