AURORA is a high-performance rubber that changes color depending on the angle of light and has excellent heat retention, flexibility, and waterproofness. Its design and functionality have been praised overseas, and it was awarded first place overall out of more than 400 entries from all over the world at the new material selection event at ISPO, the world's largest sports goods exhibition. Received the honor "Overall Best Product". We manufacture environmentally friendly domestic rubber that does not use any petroleum, using high-purity limestone containing 99.7% calcium carbonate mined from Mt. Kurohime in Niigata Prefecture as the main raw material.