The instructions contain detailed photos and video explanations, so even a beginner can do it.
Yarn:

• 100% merino wool approx. 262 y(240m)/100 g.
• Yarn was used for sample: Lana Grossa Cool Wool Big Vintage 131 y (120m)/50 g Needle:
• US 3 /3.25 mm 16’’ circular needle
• US 3/3.25 mm double pointed needle
• 5 stitch markers