rollneck

/ (ˈrəʊlˌnɛk) /

adjective

(of a garment) having a high neck that may be rolled over

noun

a rollneck sweater or other garment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012