personally, I prefer cotton and you can find some great cotton fabrics that are heavier than in years past. Kona Cotton solids are a great choice and actually cost less than most quilters cottons. If you purchase at JoAnn fabrics, you can also get them at 40% off with coupon. I buy most of mine at Hobby Lobby, usually 30% off and with a wider variety of colors to choose from than my local Joanns. Shop around to see the colors you like, there's a rainbow to choose from and if you don't have any nearby, they're still relatively inexpensive online. Your batting will make a difference, too....poly might be good choice for lift & warmth.