The thong straps appear to be made from the fabric of a modern patterned obi belt. I think these can be worn year-round, but the color scheme is perfect for wearing them from now on. Please check the photos for any damage. The widest part of the oval sole is 8 cm. I believe the thong straps are made from obi fabric. These are recycled items, so please refrain from purchasing if you are overly concerned about condition. There is no storage odor, so please rest assured. I am an amateur, so please understand that there may be some errors or oversights in the measurements and inspection. Due to the lighting and the differences in the devices used by the viewers, there may be slight differences in the colors of the items I am selling, but I try my best to display the colors as close to the actual items as possible. The color of the photos may differ from the actual product color depending on the lighting and the settings of your device. Please purchase with your understanding and agreement. If you have any concerns, please feel free to ask.