Regia Cotton and Schoppel Wolle Sport Cotton sock knitting yarns Regia Cotton self patterning and solid colour sock yarns and Schoppel Wolle Sport Cotton sock knitting yarns are soft, machine washable and hardwearing - perfect for babies and children's wear as well as summer socks. Regia cotton sock yarn is a soft and stretchy blend of wool with 34% cotton and 25% nylon, while and Schoppel Wolle Sport Cotton is perfect for anyone who dislikes wool with a fresh mix of 75% cotton and 25% nylon. Both 4 ply, 2.5mm needles recommended. 100g will make a pair of adult socks.