This black crewneck sweater from Andersen-Andersen is part of their Sailor line.
Auralee
Maison Margiela
Studio Nicholson
Mhl.
Batoner
A.PRESSE
Ymc
Norse Projects
Berner KüHl
American Trench
Howlin'
Nepenthes Online Store
Lemaire
COMME des GARÇONS
Still By Hand
Soft Goat
Jil Sander
Tcc
Adsum