Skyin Exercise Mat by, Natural Tree Rubber+Ultra Absorbent Microfiber,Eco Friendly,Two Side Can Be Used,Non slip Mat for Exercise,Yoga and Pilates Combo mat,made of natural tree rubbera and Microfiber towel(printed with water-based ink) ,Extra Long 72 Two sides, When you do hot yoga, you can use the black side (The best slip-resistance on the market).Other times,you can use the colour side. Unique designed mat strap,you can carry in your hand, Or on your back. It can be either buttoned on mat or taken down. Based on 4mm natural tree rubber, provides more cushion than the other Combo yoga mats on the market, SGS approved Free from Phthalates and heavy metal elements.No Odor.Pregnant women and children all can use it