Leaking blankets, rain and a weird dampness

I picked up these blankets at D'Mart a few months back. New and wrapped and unused, I finally unravelled them for the monsoon when I need over four-five thick blankets to keep me from the dampness and chill. However, something peculiar about these bed-sheet-cum-blanket. They are oozing moisture. First time, feeling lazy and sluggish, before going to bed, about two hours ahead I spread all the blankets the way I liked them, layered, so that when I felt like hitting the sack, I could just slide in underneath them. It felt damp that night. I did not pay much heed since I thought it was the weather. Feeling quite sick for the next day or so, I shivered through two nights till I realised that the bed also was feeling distinctly wet and not just damp. Amazingly, there were wet patches on the mattresses. Since I am not not (yet) incontinent I wondered at that, and put a yoga mat on top of it, thinking I may have inadvertently left a window open that day when the monsoon descended... But the wet patch kept spreading.And with the other bed sheets feeling damp I was distinctly uncomfortable. I put all of them on my clothes drier, to dry them out. And amazingly found dribbles of a brownish sticky water oozing from the ends of each of these blankets.
Seems something in the blanket was trapping moisture from the atmosphere. Both blankets continued to leak this way while they hung up... and left an unmistakeable trail of water on the floor. Strange. I was glad I had not kept these blankets with expensive clothes, since they could have stained them... I have now dumped both blankets ...
Anybody has any explanation to this strange behavior of my blankets? I am all ears:)