Year-round bicycle commuters know that rain and wind can chill your ears and lower your body temperature making your ride unpleasant. These easy-to-knit wool ear covers are designed to slide onto bike helmet straps. They're warm and they'll stay put. Originally published in MenKnit magazine. Would also be great in Knit-One Crochet-Too's Wick (polypro and soy) yarn. GAUGE Gauge: 20 stitches and 24 rows = 4 in/10 cm.