I don't have any Ibex boucle pieces, but the Ibex boucle description says:
Sounds kind of thick but soft. NZ Merino wool, of course.Boucle must be French for “this much indulgence can’t possibly be legal.” This ultra-cozy, smooth-on-the-inside, looped-on-the-outside double-knit merino provides superior warmth retention and the softest exterior you’ve ever felt.