Nature Baby Billy Jumper Seed Oatmeal Marl Stripe Daisy and Hen Chunky Classic Round Neck Jumper for Babies and Children, Child's Nature Baby Billy Jumper Bold Sunny Stripe Chunky Knit CHUNKY KNIT JUMPER STONE Petite Co au Nature Baby Billy Jumper (6m 5y) David Jones. The Billy Jumper is a classic, easywearing sweater style that will keep little one comfortable all year round. Knitted in a chunky certified organic cotton yarn, this jumper is durable and easy to care for. * GOTS Certified * 100% organic cotton * chunky tuck knit stitch * knitted rib cuffs and hem