For the neck-warmer I had in mind, I wanted to try this Alize Maxi yarn, and I am so happy I did, because it turned out to be the perfect one for this project.
Alize Superlana Maxi is a super bulky weight (100 gr/skein), and it has an amazing velvet feel. The content is 75% Acrylic and 25% wool. 
Preferable hook size: 8-10mm hook. 
Gauge: 12dc st. over 10 cm/ 3.93″ in first row. 
Crochet stitches in American terminology: chain (ch), skip (sk), slip stitch (sl st), single crochet (sc), double crochet (dc), front post double crochet (fpdc), double crochet back loop only (dcblo), treble (tr).
Measurements of neck-warmer –  Length: 25cm/9.84″, width : 42.5cm/16.7″

Before we begin, when you make the foundation chain +row 1, check to see if you like the fit of the warmer around the neck. If you feel it should be bigger, increase the number of foundation stitches, but pay attention to retain that stitch count throughout. Also, please note that: The written  pattern in its entirety along with the photos are for personal use only. All property rights belong to Maya Kuzman of The Little Treasures. You are welcome to sell finished items from this pattern.
Foundation and row 1: (for the foundation chain, start with one hook size bigger, in this case 9mm hook) ch45, change to 8mm hook and starting from the 4th st. from chain, dc1 in all (43). Ch3 and turn work.
Row 2: (the ch3 at the end of row counts as a stitch) starting from 2nd st., fpdc1 in all (43). We are going to maintain the same count of stitches throughout, so I will not give the stitch count further. Because the ch3 at the end counts as a stitch, always sk 1st st in the new row. Ch3 and turn work.
Rows 3-10: starting from 2nd st., dcblo1 in all. Ch3 and turn work. 
Round 11: (edging all around the warmer). Ch3 and dc2 in 1st st of that chain (I will refer to this as a “shell”). Next, sk2 (not counting the 1st st) and sc1 in the third st. Repeat this pattern to the end, where you sk3 and sc in the last st. This is the upper side edge pattern. For the side, repeat the same pattern, but after you make the shell, skip the next row and sc in the next. Repeat the pattern, to the end where you don’t skip a row but sc in the last row of the side. Next, work the bottom side pattern (same as upper side) and then the side pattern again. Sl st into 1st shell to end round. Cut yarn and work tails. 

Bottom edging extra row: turn the crochet work so that the  bottom is up, and insert yarn into bottom of the first shell. Ch5 and tr2 in first st. of that chain, then sc1 between the shells of the row below. Repeat this pattern to the end of row. Cut yarn and work the tails.

Make a long chain – mine is 120 cm long /47.2″. Mind to leave a long tail that will be slid through a tapestry needle, so that you weave it through the warmer.

Insert needle into the 7th row (I believe this is ideal, but you can insert the tie where you think would be best for you). Slide through 2 posts below, take needle out, sk2 and slide down again. Repeat this until the chain appears on the other side of the warmer.

Fold the upper edge a little, tie it around and voila! You have a new warmer! 
Write your questions in the comments if you have any.