The name says it all: GRS is the Global Recycling Standard, so you can create projects for yourself and help protect the environment while doing it. And Amicor provides long-lasting protection against odor, allergens, and bacteria (up to 100 washes), keeping garments feeling fresher for longer. It's certified safe for babies and kids, as well as bedding, hats, gloves, pets, and beyond! And this Thick & Quick version works up quickly so can create more projects while protecting the environment and your loved ones!​3 Skein PackWeight: Bulky (5) Contents: 65% Recycled Polyester, 35% Amicor Skein Weight: 3.5 oz. /100 g Yardage: 87 yd. /80 m Knitting Gauge: 12 sts - 16 rows = 4" (10 cm) Crochet Gauge: 9 sc - 12 rows = 4" (10 cm) Suggested Knitting Needle: 8 mm, US - 11 Suggested Crochet Hook: 9 mm, US -N/13