Although it is already spring here, it can still be very chilly. An ear warmer like this one would be perfect for this weather. It is made with Aran / Medium (4) weight yarn.
If you don’t know how to crochet the thermal stitch; you can find a video tutorial of the thermal stitch HERE.
The free crochet pattern of the Thermal Ear warmer can be found on the website of Free Crochet Pattern Daily.