Shonan Besan [SIX LINE] makes it possible to decompose in a few years even if it is swept away by the sea! It is the only eco-friendly domestic flip flops in Japan. We will protect the future of the ocean, which we are always allowed to play with. It was born from the voices of surfers who are concerned about marine pollution when flip-flops, surfboard deck pads, bodyboard fins, etc. are washed away. Made with 100% organic biodegradable promoters and natural rubber, the 18mm natural rubber thick sole creates just the right amount of soft comfort and leads you to relaxation mode. It can be expected to biodegrade in a few years, but it will not decompose unless it is left in the ocean or buried in the soil, so it will not affect the life of the product. Besan, a new sustainable biodegradable material, is kind to the earth and the environment, and does not compromise on style. ~All from the desire to "protect the ocean"~ Country of origin: Japan Ingredients: Natural Rubber & 100% Organic Biodegradable Promoting Additives Sole color: 5 colors Thongs color: 5 colors