Yes, I have the Halford branded Velcro pouch.
There are 2 compartments, one is RFI open and the other RFI shielded.
This maybe a design feature, or shortcoming, but I use mine always in the shielded compartment and so far the car opens and starts, however the proximity to the car for operation is much reduced. Saves messing in pockets swapping the key to the open pouch.
Also, I keep the spare key fob with battery out, so it cannot respond if needed and doesn't waste the battery.
I try it out every few months, perchance it forgets it's identity.