These make cold, wintery days much more bearable and, because they are lightweight and collapsible, they fit the one-bag theme perfectly.
Soft thermal fleece lining keeps ears warm in any cold weather activity. May or may not stay in place while running.
I would prefer a beanie hat with Bluetooth headphones.
Check the price now: 180s Mens & Womens Unisex Bluetooth Ear Warmer, Black