Bought a micro brand called Vedavoo. Handmade fly fishing slings in US
Model I bought is called The Beast and find it fits the ideal balance between size and practicality for use and storage. Used it for past two seasons. Great net ring.
KEY for me is the sling sits on my left shoulder, off my right handed casting arm eliminating fatigue. Nothing in front when casting to tangle as well.
Vedavoo offers left or right shoulder models.
Hope that assists.