Easy to follow sock pattern suitable for intermediate crocheters looking to expand their skill sets. The socks are adult sizes, and features a comfortable heel flap and double crochet (single crochet) sole. 

This pattern has been tested, but if you do come across any errors please do get in touch, as occasionally some do seem to find their way through the tech editing phase.
Version 4 now available

Materials
Adriafil Calzasocks (50g/210m), 1x solid colour, 1(2) x variegated
Alternative yarn - Cygnet TWR (100g)

Finished Size
Adult shoe size 4-5, 5-6, 6-7, 7-8, 8-9 (if you have a wider foot size try using a 3.75mm hook). Sock Length is personal preference, however the larger sizes will need 2 balls of variegated even for the shorter length.
Sock length from cuff to heel flap is written as 10 (12, 15, 16) cm

Special Stitches
HBhtr – (Herringbone Half Treble) = yo, insert hook, yo, draw through st and first loop on hook, yo, draw through both loops on hook.
Inv (dc) dec – (Invisible decrease using a double crochet) = insert hook into front loop of next 2 sts, yo and draw up a loop through both front loops, yo and draw through 2 loops on the hook.