Helen's Lace Firefly is that shade of yellow you see just as the firefly lights up. Helen's Lace is a delicate 50% Silk 50% Merino blend that is ideal for heirloom shawls and infant christening gowns. Works perfectly for summer shells or short sleeve tops. Keep your project soft and silky by using a wool wash. This 3 1/2 oz hank has a whopping 1200 yds. The needle or hook size used can vary immensely depending on if the project is a shawl which is open and wispy, or a summer top that needs tighter stitches for no peek-through.