When I saw a screenshot of this open-fronted pajama from the Simtimates collection, it immediately made me want to get the kit ... but it also made me want it in more colors. Unfortunately, my attempt to recolor the tiger pattern was a failure, so no tigers at this time. But you do get eight solids and three subtly patterned recolors.
The pajamas can be worn by ages Teen to Elder. They were originally designed to be worn by male sims, so although they can be worn by both genders, they flow a bit oddly when worn by female sims, as shown in the last two pictures. Since the original came from the Simtimates collection, you will need that kit if you want your sims to wear these.
I will most likely go back and make another attempt at recoloring that tiger pattern, so hopefully there will be tigers in the future. But I have a lot of other ideas too, so that may have to wait a while.
The hair shown in the pictures is from Obscurus Sims, S-Club and Leah Lillith, the shoes are from Arltos and S4Nexus. The backgrounds are my own.