In reply to tlm:
I do this all the time, if I like something I will buy several of them in the hope I will always have them, at the moment I am sitting in one of my four pairs of Arcteryx spotter pants , one of two Rab Aeon base layers, one of six Pringle lambswool jumpers, ( some the same colour ) even undies and socks and shoes all multiple,
it can be expensive but I don't have to think much about what I wear.
on the down size I can freak out if i ruin one and can't replace it.
I even do the same with kit, I own 2 and a bit sets of RP nuts if I didnt I wouldnt use the ones I do as much.
OCD?