KH Fusion replaceable seatcover

Just got mine today. I installed this cover on an old piece of KH foam.

Nice handiwork on this product. Seams are good, and cover materials as well, but some of it appears to be thin vinyl.
There’s a shoestring laced into the bottom of the cover, which is supposed to draw the cover tight on the seat base. My only gripe about this is that tugging on the string to snug up the cover will rip the bottom of the cover where the string inserts. So beware and don’t pull hard on the string!

I plan to re-sew a better string holder at the bottom of the cover, but the cover should have come with a stronger material so as not to tear through.