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From the description:
Hook No. 4,5 mm from thick yarn tie a chain of 200 loops, 2 the last loops tie together , there remain 199 loops. Then knit 3 rows of embossed gum, 3 rows of embossed track, 5 rows of embossed elastic, 3 rows of embossed track, 3 rows of embossed elastic. All!
You knit a chain of the desired length and alternate the rows of the embossed elastic band and the rows of the relief track as many times as you see fit. Very simple knitting, and the result is impressive!