Sewing on the fleece fabrics, dulls the needles more often. 2: Use a universal, stretch or ball point sewing machine needles. Choose the needle size according to the weight of the fabric. For most fabrics 80/12 will work. The thicker the fabric, bigger the size of the needle. 3: Use a good quality 100% polyester thread.: Use a universal, stretch or ball point sewing machine needles. Choose the needle size according to the weight of the fabric. For most fabrics 80/12 will work. The thicker the fabric, bigger the size of the needle.