My daughter had a pair of In Season TR 2, which she loved.  She wore them until they broke and was heartbroken when we threw them out.  Because of this, I purchased a pair of the In Season TR 4 for myself.  I needed the memory foam to help with my Metatarsalgia.  I was having a hard time walking as I was in severe pain.  The memory foam provides the extra padding and comfort that I was looking for.  However, they are not as well padded as the TR 2 my daughter had.  They also have an attached tongue, which made the sneaker very tight around my foot and caused rubbing at the back of the shoe.  I got blisters on both feet the times I have worn them.  I have to wear them with cushioned socks and band aids on the back of my foot, which is a first for me and Nike sneakers.  I understand the purpose of the attached tongue, but it doesn't work well for everybody.  My feet have been paying for it.  I do love how light they are and how flexible the soles are.<br />In the end, I detached the tongue and now the sneaker feels so much better.