YLLINS is our most sustainable product we have produced so far, where the materials are well selected to minimize the impact on the environment. fits perfectly in all weathers and both in the city and in nature.YLLINS is handcrafted from FSC®-certified natural rubber from forests independently audited according to Forest Stewardship Council® standards. A soft and comfortable Yulex® lining that surrounds and isolates the foot from cold and water. Yulex® is based on natural rubber instead of fossil substances and has been laminated with recycled spandex. Comfortably shaped insole from Bloom made of biomass from algae. The outsole has a rough pattern that provides good grip even in the messiest terrains.