Pellon-Down Alternative Nano Polyester King Size Comforter. This 100% polyester comforter is filled with the finest hypo-allergenic siliconized fiber for a warm and comfortable night's sleep. It is a down-alternative, which is perfect for allergy sensitive sleepers. Siliconized polyester outer cover. Machine washable and dryable. This package contains one 104x86 inch king size comforter. Imported.