Reply To: Questions on constructing a Double layer Onesie pajama

[professorpincushionParticipant]

Hmm…I’ve never seen a lined onesie before. I think with both fleece and sherpa, it’s going to be really thick, especially where you have seam allowances and might be rough getting through on a basic machine. Not only that, but it might be too warm and I’m saying that as someone who gets cold pretty easily. Instead of two extra thick fabrics, you may want to do fleece on the outside and flannel on the inside. Fleece does have some stretch but not so much I’ve ever had any issues working with it or had it distort on me. In my opinion, I wouldn’t bother stabilizing it and add even more stiffness to the garment. You’ll just want to stay stitch necklines or any curved areas that could distort.
Also are you using a pattern? I did find this one which seems basic although I doubt any of these are lined: https://www.joann.com/simplicity-patterns-1731a-adult-childs-fleece-jumpsuit-size-4-5-6-7-8/15042021.html Personally, I think tackling a lining and invisible zipper in a onesie might be too advanced for a novice sewer and even give me a headache trying to figure it out. Maybe start with just a single layer of fleece first and see how it goes to at least get you comfortable with the pattern. But if I were attempting it, I would probably try a similar approach of creating two onesies without the hood, insert one inside the other (wrong sides together), baste the edge where the zipper will go into together and put in the zipper like you would if there was not a lining. Yes, you’ll see the zipper tape on the inside but it’ll be a lot easier in trying to make this whole thing work. Then I would put on the hood, (already sewn with lining and flipped right side out), but I would only sew the outer hood to the neckline of the onesie with a machine seam and then hand sew the lining hoodie over the seam to cover it and make it look nicer. (Similar to what I do for the hooded cloak assembly tutorial. phew! I hope that helps a little and good luck! 😀