The shell is only as dependable as the material it is formed from.
4332 is the grade specified for holsters and sheaths because of how it behaves when a formed shell is struck or dropped. The figure is a notched impact result, which is the harder case: the notch is a deliberate stress concentration, and the material is measured on how much energy it absorbs before the crack runs. That is the failure a carried shell has to resist.
Boltaron specifies 4332 as cold-crack resistant, with high impact performance at cold temperatures. Cold is where thermoplastics turn brittle, and brittleness is what turns a knock into a crack. A shell that stays tough on a frozen morning keeps holding what it carries.


4332 does not absorb water. Sweat, rain and river crossings stay on the surface, so the shell keeps its shape and its grip on the firearm, and it never holds damp against the finish. Wipe it down and it is dry.
Equipment meets cleaners, solvents and salt long before it meets anything dramatic. 4332 resists acidic and caustic chemicals and cleaners across the full pH range, so routine contact does not soften, craze or discolour the shell.


Every shell is formed around one exact firearm model, and 4332 takes that shape cleanly into the deep pockets and tight corners where a holster does its work. The result is retention you can feel on the first draw and the hundredth, and a second holster that fits like the first.