Cascade Avalon Yarn (Worsted Weight Cotton Acrylic Blend) Multi Bright Mix #311 Cascade Avalon Yarn - Multi Bright Mix #311 Beautiful 50% Cotton 50% acrylic blend! This brand new yarn from Cascade is really at great price! Perfect for children's garments, baby blankets and summer wear. Allergic to wool? Use Cascade Avalon Cotton Acrylic! SIZE: [4] Worsted Weight. 16 - 18 sts = 4" (10cm) US 7 - 8 (4.5 - 5.0 mm) 50% Cotton 50% Acrylic Blend. 175 yds (160 m) - 100 g (3.5 oz) Machine Washable! Tumble Dry on Low.