LaCrosse Primaloft Comforter, Medium Warmth, Full, Blue Denim Our best-selling down alternative comforter 500-550 fill power Primaloft Deluxe synthetic microfiber fill 250-thread-count combed cotton shell. Sewn-through 12 box construction Features corner loops that attach to the corner ties in our duvet covers to hold it in place Machine Wash. Lifetime guarantee.