The Sleep Philosophy down alternative comforter collection features 3M Thinsulate Featherless Insulation-600 Fill Power. This revolutionary, loose fill down alternative mimics or surpasses the performance of natural down in Fill Power, loft and overall performance. Made of durable, lightweight polyester fibers, 3M Thinsulate Featherless Insulation provides warmth without a single feather. The Sleep Philosophy down alternative comforter collection features a silky-soft 300 thread count, 100% cotton sateen cover. The comforters have sewn through diamond quilting so that the down alternative fill doesn’t bunch or shift. They’re also hypoallergenic so you’ll have a comfortable "sneeze-free" night’s sleep. It’s also machine washable for easy care. Great sleep, it never goes out of style. That’s our Sleep Philosophy. FEATURES This Level 3 down-alternative comforter provides maximum warmth for when it's really cold and all you want to do is just stay in bed. Filled with 3M featherless fiber, this revolutionary, loose down-alternative fill mimics or surpasses the performance of natural down in fill power, loft and overall performance.