This UV color change yarn is available in four fun colorways and pairs similarly in weight with HiKoo Simplicity. Just take this yarn outside to watch it magically transform into a bright color!
35% Superwash Merino wool 50% Polypropylene 15% Nylon 100 yards / 50 gram hank US 4-6 (3.5-4mm) needles 5.5-6sts per inch