Keep him warm on the ski slopes, in the woods, or even just out playing in the snow with the kids with this comfy ski mask. The design is knitted using bulky or worsted weight yarn and sizes 8 (5.00 mm) and 10-1/2 (6.50 mm) straight knitting needles. You’ll also need a size G (4 mm) crochet hook to work a finishing edge of slip stitches around the opening for the face.