We're both riders so we have several of these Smartwool gaiters and love them
The Smartwool Merino neck gaiter is just the right fit - not too bulky but warm and comfy. Generously cut for multiple wearing options. Typical great Smartwool quality.
This is an excellent gaiter for cold weather riding. It is comfortable and a true one-size-fits all. It stays up and is highly recommended.