Wicker baskets full of dried skin bits. Jars of dandruff flakes on special. Hair strands, straight or curly - will cut to length. Dirtballs. Furballs. Jars full of phlegm. Nose pickings, big or small. Every piece of a human that could fall off, be picked off or scratched off.
They had tied the four corners of the skin together with strands of hair, then sealed up the join using big handfuls of earwax they scooped out of a jar. They left a small hole that they could plug later with a piece of dried nose picking and then they let the wax dry.