I have been using this Kulae tpECOmat for 2.5 years in yoga class 2-3 time a week and LOVE IT! I have the one that is slate (grey) on one side and moss (green) on the other. It's an extremely lightweight mat. I like that it's two-toned, because I can flip the mat when I feel like having a different color, although the slate side is my favorite. The tread patterns makes it nice and grippy and I find the colors very soothing for yoga. This is a biodegradable mat so you cannot leave it out in the sun or it will breakdown. BUT, I do leave it in the back of my car where I have limo tinted windows, and the mat is still perfect. I liked that the mat was biodegradable because those cheap, fake plastic mats just have the worst smell to them. This mat does not have that funky synthetic smell. The Kulae website says that it's "Constructed using closed cell technology (so germs, bacteria + odor cannot penetrate the mat surface)" and I can attest to that because my yoga mat has never smelled! :-) When I look around the room at other people's mats, I still think my Kulae looks the nicest and the cool tread patterns (one side looks like snake tracks) really makes it stand out. They're not just decorative, they really work for grip! This mat is MUCH longer than most standard mats and I LOVE the extra length. I'm 5'5" but I like that my head is never falling off the edge of the mat. If you like a thicker mat, Kulae makes that too, and if you're concerned about Phthalates, their EASYmat is free of those. I am seriously happy with my Kulae tpECOmat and am thinking about buying a second mat just to use at home. - Lydia M.