Accordion stretch panels in the shoulders suit any ride from the highest of ape-hangers to lowest of clip-ons.
3-Layer weather-resistant liner easily zips out when not in use.
Up front, there’s ventilation in spades.
It’s easy to keep too much material from flapping in the wind with the buckle adjustment tabs on the lower sides. Unlike Velcro that’s sometimes used to do this, these (obviously) will stay put!