Sierra Comfort Folding Gymnastics Mat, 4 x 4' Ideal for: gymnastics, exercise, yoga, sitting, martial arts, fitness centers, stretching, massage and many more Dimensions: length 4-feet x width 4-feet x height 2-inches. Folding 2-panels design for easy storage Hook and loop fasteners on each end to Connect additional mats. Contains high Density cross-linked polyethylene foam Durable 18oz outer vinyl covering is non-absorbent, puncture and mildew resistant. Meets cpsia standards for lead and pthalates. 1-Year Warranty