As most have suggestioned on style of slings I can reasonably concur.
But when deciding on a; type or style of slings, it is an individual's decision and how "their" feel in the ability/comfort to use a type/style of sling.
Not all slings of similarities work for everyone. Aka 1 size doesn't fit, or work for, all.
For those that can effectively use "soft" aka elastic, slings that's great. For those who prefer "hard", non "stretchy" slings; I'm biased, understand how to, why, and when to, the use of the sling.
Rifle slings ARE a multi purpose use item. Meaning they are used for multiple purposes at the same time!, and to be employed as the situation dictates, within a instant, seconds, or minutes.
I prefer a "Ridgid" leather or cotton web sling because that is what I train with and use. Width is irrelevant! To a point!
Elastic and otherwise, "soft" slings have a multitude of "problems" "adjustments" to overcome.