I am selling this item because it is unused and unopened. I purchased it from the official website. The purchase date was September 2025. Product Features: "Safe and Secure Design" * Antibacterial treatment * Anti-mite treatment * Anti-static treatment * Certified flame-retardant * Produced and inspected in a domestic factory * The pile that directly touches the skin has obtained Oeko-Tex® Standard 100* certification *: World-leading safety certification targeting over 350 harmful substances "Easy to Install and Maintain" * Tile carpet type, so it can be installed regardless of the layout * Non-slip backing (no adhesive, so it can be easily removed) * Vacuuming is sufficient for daily maintenance (thick enough for robot vacuums to pass over) * Can be washed with water if soiled * Uses durable materials with the highest usage rate in hotels "Cool in Summer, Warm in Winter" * High contact cooling value, easy to use even in summer * Insulating structure that doesn't transmit the cold of the floor, so it's okay without floor heating in winter * Feels smoother than wool, comfortable all year round * Recommended for saving on heating and cooling costs Luxurious design by a designer who develops carpets for five-star hotels and rugs for top brands. The millimeter-level adjustments make the seams less noticeable, allowing you to enjoy an open space when laid throughout the room. Also, because it is designed to prevent dust accumulation, you can maintain its beauty for a long time with simple maintenance. The sound insulation grade of the floor is LL35 (ΔLL-6), the world's highest level for a mat alone. A patent has also been obtained for the shock-absorbing structure. In tests measuring the volume after absorption, the soundproofing performance was approximately twice that of cork mats (equivalent to LL45)*2. It absorbs various sounds, including footsteps, to the maximum extent, and can reduce up to 82% of the sound at 2000hz, which is said to be the frequency band to which people are most sensitive. *1: Test results from external testing institutions for commercial products and Soundproof Senka are listed *2: The reduction rate (-82%) is the result of dividing the db values ​​during/non-installation of Soundproof Senka. Soundproof Senka Soundproof Senka Piering