Having a performance midlayer can make such a difference when you are on the course when the weather takes a turn for the worse. Every golfer needs a lightweight top that can act as either a mid or top layer depending on weather conditions, the new Sunderland Arizona midlayer does exactly this. Sunderland\'s Arizona midlayer is a lightweight top that comes with a quarter-zip that is ideal when the weather turns colder. It is made from 90% polyester/10% elastane which allows you an incredible amount of stretch (4-way ) meaning that you are totally unrestricted when you are swinging the club.