Knit, not neoprene. Thin enough under a shirt, soft enough to sleep in, with a chest strap that keeps it where you put it.
The strap crosses your chest and anchors to your torso, so the brace stays where you put it instead of working its way down the arm.
No buckles or hard panels to press through fabric, so it works at a desk, in a car and under a uniform.
Air passes through it. That is the main reason people give up on the neoprene kind within an hour.
One brace fits both sides. Nothing to get wrong when you are buying it for someone else.
Most shoulder braces are built around a neoprene shell. Neoprene is stiff and doesn't breathe, so within an hour it's warm, damp, and pressing where you don't want it. And because a shoulder isn't a fixed shape, a sleeve held on by friction alone works its way down the arm as you move.
SnugKnit is knit rather than moulded, so it stretches with the joint and lets air through. The strap across the chest is what actually keeps it in position — it anchors to your body rather than gripping your arm.
Knit stretch fabric: moves with the joint instead of fighting it
Chest strap: anchors the brace so it doesn't migrate down the arm
Flat profile: nothing to press through a shirt
