evo.com | Janji Headbands > Cold ears, solved. The Janji Revo Merino Headband wraps a 4.5" double-layer merino blend around your forehead and ears for breathable, odor-resistant warmth from 20 to 50degF. One Size Fits Most 4.5" Wide Band Revo 37% 17.5micro merino wool / 55% nylon / 8% spandex Naturally Antimicrobial & Odor-Resistant Climate Range Designed for 20 to 50degF. | Janji Revo Headband 2026 in Black | Nylon/Spandex/Wool