THIS MATS FEATURES HOOK AND LOOP (VELCRO) ENDS ON THE 4 FOOT SECTIONS TO MAKE CONTINUOS MATS. GREAT FOR YOUNG KIDS, ASPIRING GYMNASTS, AND DAY CARE CENTERS. THIS MAT HAS HIGH DENSITY FOAM WITH 18 OZ. REINFORCED FLAME RETARDANT VINYL. THE MAT FOLDS INTO QUARTERS FOR EASY STORAGE AND CARRYING HANDLES FOR EASE OF HANDLING.MADE IN THE USA FOR CPSIA 2008 STANDARDS WHICH IS A LAW THAT REQUIRES ANY PRODUCT INTENDED FOR CHILDREN 12 AND UNDER MUST BE COMPLIANT FOR NO PHTHALATES AND LEAD. PHTHALATES HAVE BEEN LINKED TO CANCER AND WE KNOW THE EFFECTS OF HIGH LEVELS OF LEAD. MOST MANUFACTURERS DON"T USE COMPLIANT MATERIAL BY STATING THEIR MAT IS NOT INTENDED FOR CHILDREN. PLEASE MAKE SURE YOU ARE GETTING A CPSIA 2008 COMPLIANT MAT FOR YOUR CHILDS SAFETY.OUR FOAM IS 100% VIRGIN POLYURETHANE FOAM, NOT BONDED WHICH IS JUST GLUED SCRAPS THAT BREAK DOWN FASTER THAN SOLID FOAM.