You can't just buy those, you'd look like an utter fool. You have to appropriate sufficient black budget funds to have the belt fabricated at Area 51 out of meteoric iron and top secret metamaterials.
We're going to have to get the ball rolling somehow, when it comes to space fashion.
When some of us get re-orged to that remote mining outpost and are forced to share quarters with some cheap, rubbery-skinned, impolite replicants, we're just going to have to make do, and don some superfluous equipment from sporting goods.
Depends on the franchise type I guess. MCU's S.H.I.E.L.D. wear and the Starfleet uniforms from First Contact and later look pretty smart, actually. I wouldn't be afraid to go out with something like this[0].
The downside is the nagging feeling like you should be wearing oversized futuristic pauldrons and a ridiculous-looking Space Belt all the time.