FMNH heel recipe allows you to work your sock either top-down or toe-up, at any gauge, and knit the whole sock before deciding what heel you want: gusseted, short-row, or classic afterthought heel. Keep your striped socks stripey over the heel area. Easily replace worn out heels. Get your knitting buddy to knit in the dreaded heel. Available for free with promo code "FMNHfree" for a limited time. Get yours from Ravelry.com.