Carolyn from Handmade by Carolyn shows how she made the lapped flat-felled split side seam on a men’s shirt she made. When you cut the pieces out, you’ll need to add little extensions where the seam will be split. This will give you the fabric you need to create the lapped flat-felled edges. Go to Handmade by Carolyn for the tutorial.
[photo from handmade by Carolyn]