Is it possible to sleep; yes, can YOU sleep on it; ?

Personally I wouldn’t spend a night on a train seat unless I was out of options, I have done it on occasion and I am unable to get a decent sleep on them. Some other people do manage to sleep quite well, I know this because I have listened to them snore for hours.

If you want some idea of what they are like I suggest you put Snalltaget as a search on Youtube.com as there are some videos that bloggers have made on these trains (as well as most others in Europe it seems)

seat61.com has much info in general-check to see if it has more on this specific operator.

Can you sleep in airline seat/eco on a long nite/flite? (i usually can-in fact better as in trains)

Thanks for the answers, I found pictures of the seats. They are normal seats.