US: M to Europe Size 44-46
Cross-market adult neck gaiter, snow gaiter, winter gaiter, and face shield apparel conversion mapping M specifications into 44-46.

Analyzing Size Equivalence Across Markets
US: M: Corresponds to a neck/face circumference baseline of 38 (15 ), vertical height coverage of 25 (9.8 ), and fit type Standard / Regular.
Europe Size 44-46: Corresponds to a neck/face circumference baseline of 42 (16.5 ), vertical height coverage of 28 (11 ), and fit type Standard / Regular.