I try to buy stuff that will last a long ,long time, but forever ? I don't know some pieces maybe,
For me, every once in a while, an extraordinary thing happens in the fashion world, an exceptional piece comes along and i instantly know that it can not be missed. Even if it means paying a fortune,like :
my faithful Oversized Gucci sweater, everything about it is absloutely perfect, the fabric, the design, how it looks worn, it still feels as luxurious as the day I bought it some 4 years ago, and I'm sure I will continue to wear it for many more years, and god forbid anything happens to it,as I think its irreplaceable, I still haven't came cross anything that looks as good as it is, not in Gucci or any other brands .
My second piece, is the chanel cardi my dear mum gave to me some years ago, its 10 years old, but the metal chains interwoven on the cuffs along with the classic cut of the cardi gives it a very fresh look, I've been asked about it by strangers if it still in boutiques , as they would like something like it, they really look very surprised when I tell them its so old!
Ditto my newest chanel jacket, I just instantly knew that I will be wearing it for a long ,long,time, it just has that element,
I have few more examples of things that I think will last a long time, My BC cashmere sweaters, LP boots, birkin, all I can see my self wearing maybe forever,
but the rest of my stuff, specially APC,marant and Bruno, I don't see myself wearing them in the long run,still love them to death though,and will keep buying from them,but I don't feel they are forever pieces, and I think they don't pretend to be either,
It seems,I'm only capable of writing essays lately, 
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Nighty night!