Delrin is a very sturdy material that is actually more dense than acrylic. Being more dense than acrylic, it is extremely durable and exhibits very low moisture absorption . Just because the material is cheaper than acrylic, don't let this call fool you as a lesser product. It still has the same qualities of our acrylic cutdown and a sound all of its own. With a price point of $100, it is sure to be a hit on any lanyard.