I received the Trek 100 down Jacket last weekend. It seemed to fight nice so I removed the tag from the inside of the jacket. Unfortunately when I tried to sit down wearing the jacket it was way to tight. I contacted Decathlon to see if I could exchange it but they said that they could not due to me having removed the tag. The fact that these jackets run small has been a known issue for years and they have made no effort to correct it. The reviews said to size up so I did and it was still to tight. I told them I have no other choice but to have the jacket measured by a tailor to see if their sizing was correct or if it is false advertising. I further stated I would be filing a complaint with the BBW and state attorney General. The sad thing is I love the jacket it looks really nice and appears to be really good quality. The tag appears to be bait as its not some little tag you can ignore its about 100 tiny tags in a little book all sewn to the side of the jacket so its not like you can wear it with out noticing the big not in your side.