Cascade Yarns Bentley - Silver #07 Cascade Yarns Bentley - Silver #07 Cascade's Bentley yarn is a real colorful acrylic wool blend, ideal for children and adults alike. 5sts = 1" (10cm), US 7 (4.5mm) #4 Light Worsted Weight Yarn Machine Wash, Tumble Dry. 75% Acrylic 25% Superwash Wool 100g (3.5oz) / 207.8yds (200m)