The cowl is crocheted by turning rows without seams. At the end of each row you need to connect last double crochet and first double
crochet of this row with slip stitch into the circle. After that you need to turn the cowl and continue to crochet the new row.

PDF-pattern included:

Tools and materials
Yarn advices
Approximate yarn usage and hook number
General method of crocheting the seamless cowl
Crochet description row by row for adult size
Pictures of all crochet stages and pictures of the finished product