Slip slidin' away

I went to check on my little one because he'd been napping for a while this morning and this is what I found. Let me give you some background- Thomas does not like to sleep lying flat on his back, he likes a little bit of an incline. This is great in the papasan and in his car seat because we can strap the little squirmer in. However, in his bed, we have what we affectionately call the "cat bed" propped up with a towel. There is also a towel at the bottom of the bed becuase he likes to kick and push in his sleep. This is how I found him- perfectly happy and content but it looks terribly uncomfortable to me.