Petra is a quality crochet thread with natural mercerized 100% cotton thread that does not go fluffy or knot easily. Petra thread is combed singed by flame and twice mercerized which gives it its strength and softness. Petra Thread is a 100% long staple cotton 2 ply thread. With its exceptional brightness and softness. Knitting and crochet designs progress quickly and easily. This package contains 100g (437 yards) of size 5 cotton thread. Available in a variety of colors. Each sold separately. Machine washable dry clean safe iron safe do not bleach. Imported.