I made these hats for my boyfriend and I as his Christmas present. Mine is the yellow one with a line of green and his is the green one with a line of yellow, as my favourite colour is yellow and his is green. I used 'daffodil yellow' Simply Chunky yarn from Paintbox yarn. It's affordable and good quality for acrilic. The green yarn I used was given to me by a friend-I'm not sure specifically where it's from or what type of yarn it is (it might have been mohair?) but I really enjoyed working with it. I really recommend the pattern I used and am looking forward to making more similar beanies.