I have a collection of 7 fukuro obi, 5 nagoya obi, and 1 kobukuro obi. The top row of the first photo shows fukuro obi, which I believe are all silk. The bottom row contains 3 nagoya obi that are unsewn, so I can't tell if they are silk or synthetic. The black satin obi and the light wisteria-colored flowing water pattern obi are silk. I believe the kobukuro obi is synthetic. Most of them are wearable, but I haven't checked them in detail, so please understand this. This is a bundled item, so please refrain from requesting individual sales or measurements of items within the bundle. The items are quite heavy, so discounts on the bundle or combined shipping are not possible. Thank you for your understanding. ※ Occasionally, the number of items listed in the title may differ from the actual number of items. Please refer to the photos, as they show the correct number of items. Please confirm the photos and purchase at your own risk.