Some colorways are Self stripping and others give you 2 identical socks. Whichever way they will knit up, it will be a delight to watch them evolve. 
Each kit contains enough for one pair as follow: 
2 cakes of 50 g/ 167 m plus 30g for the contrast colour. 
Weight: Fingering 
composition: 80% merino, 20% nylon 
Please note the contrasting color might vary from the picture but is always well coordinated.