Europe Size 40-42 to US: XL
Cross-market adult neck gaiter, snow gaiter, winter gaiter, and face shield apparel conversion mapping 40-42 specifications into XL.

Analyzing Size Equivalence Across Markets
Europe Size 40-42: Corresponds to a neck/face circumference baseline of 38 (15 ), vertical height coverage of 25 (9.8 ), and fit type Standard / Regular.
US: XL: Corresponds to a neck/face circumference baseline of 46 (18.1 ), vertical height coverage of 31 (12.2 ), and fit type Relaxed / Oversized Coverage.