✅ Brand new set of 4 authentic rubber mats, 50cm square and 20mm thick. These mats feature a stylish pure black color, unlike the usual mix of white chips. ✅ These professional-grade training mats are perfect for home training or free weight areas in gyms. They are actually used on the floors of free weight areas in sports gyms across Japan, boasting high-weight specifications. ✅ The 2mm surface layer is made of EPDM rubber, providing excellent firmness and stability. This allows for stable high-weight barbell squats and other exercises. The 18mm lower layer uses SBR rubber, offering outstanding soundproofing and shock absorption. It effectively protects the floor from damage. Surface hardness is approximately 65, and bottom hardness is approximately 45. ✅ The EPDM material sheet on the mat surface is smooth and does not absorb water, so sweat can be easily wiped away with a cloth.