they are 2nd hand, I have bought lots of different things to try - I gave up too easy last time as bamboozles took waaaay too long to dry and I felt bad for going straight for one type and giving up when it didn't work for me.
They are not very slinky but I got size M, 14-20lbs, and he is 15lbs so I expect it to be on the large side!
So far so good, stuffed it with a muslin as my boosters haven't arrived yet