Our Biosole™ outsole features natural rubber that replaces synthetic rubber and reduces oil dependence. Natural rubber has about half the climate impact of synthetic rubber. Biosole™ is made of 90% non-oil-based components, 62% of which are natural rubber. This rubber mixture provides good grip all year round by staying soft and flexible at all temperatures. Biosole™ also has excellent abrasion properties, making it a durable sole that lasts a long time. Icebug is a leader in buying FSC-certified natural rubber from sustainably managed forests in Thailand. We hope to make this more widespread in the footwear industry.