NSF Dorian Trench in Pink. - size M (also in ) NSF Dorian Trench in Pink. - size M (also in ) 100% cotton. Double-breasted front closure. Side flap pockets with button closure. Epaulettes. Belted waist. Back vent. NSF-WO91. 3177 CTW. Based out of California, NSF has caught the eye of many. With their clean design and boyish charm, NSF is recognized for its relaxed, modern style looks.