My dog loves this toy and has done well with many of the P.L.A.Y. toys. Despite his ability to chew corners of his dog beds, this and his other toys have remained intact. The "rope" that makes up the tracks is similar to the rope on the chicken & waffle toy, I think they call it t-shirt rope. Unlike his other ropes, he can't cause fraying.
It's a beautiful toy and my dog loves it! The ropes are slightly stretchy and pull back and forth through the toy.