This is a free pattern on Heart Hook Home, this is the printable version. See link for free version.

Materials:

Red Heart Hygge yarn recommended (see notes below for yarn substitutions)
-approx. 400 yards for 6/9 M
-approx. 500 yards for 12/18 M
-approx. 565 yards for 2/3T
-approx. 920 yards for 4/5T
-approx. 1050 yards for 6/8
-approx. 1150 yards for 8/10
-approx. 1400 yards for 12/14

Crochet hook in size 7mm (pointier the better)

Gauge: 10 sts x 14.5 rows = 4” square

Pattern Notes:

Pattern written in US terms.

This pattern uses front post/back post crochet stitches. See a written and video tutorial for this stitch here: http://hearthookhome.com/crochet-front-post-and-back-post...

Waistcoat stitch (wc) Similar to the single crochet, except you go into the post of the stitch from the previous row instead of the top of the stitch.

Make sure you stay LOOSE as you work!! It makes going into the stitch easier the following row. Measure periodically to make sure you’re on track.

Watch the Waistcoat Stitch tutorial before you start: http://hearthookhome.com/waistcoat-crochet-stitch/

Place first sc of the row in the very first st. Place first wc st in very next post. End row with sc in last st, skipping last post. (for clarification, see photos of first stitch and last stitch placement)

YARN SUBSTITUTIONS

This pattern calls for Red Heart Hygge yarn, a size 5/Bulky weight yarn. Because this yarn is so much softer than a traditional bulky weight yarn, I find that it is very pliable and amazingly comfortable to wear. If you use a different bulky weight yarn, that WILL work, but you may find the finished product to be a bit stiff. This stiffness will get better with laundering the hoodie, or you could opt to use a worsted weight yarn instead. Note that the gauge is the same whether you are using worsted weight OR the Hygge (bulky weight/size 5) yarn. That being said, if worsted weight is used in substitution for the Hygge/bulky weight, you may need a bit more of it.