One does not need - but is great!

I bought these "adult onesies" to manicured chilling on the couch - and that he accomplishes this purpose fantastic! The quilted fabric is warm and cuddly and makes a high quality impression. The latter also applies to the zipper. In addition, the length is shoulder-step very well sized, I had dabbled with another product in which you could not bend over forward. Add to this that the legs are a bit too long, but what I feel as a absolute advantage.