1994, Skiing (volume 47, number 4, December 1994, page 212)Don't think that technical features and concern about breathability is only for super-techno-dweebs, backcountry skiers, and serious overheaters.
2002, Gene Prater, ‎Dave Felkley, Snowshoeing (page 75)A crewneck works well for overheaters and warm spring days; turtlenecks keep warmth in and snow out; and zippered turtlenecks are the most versatile. There are varying fabric thicknesses to choose from on the market.