Elnan again,
In years past or passed, I made a lot of knit tights, shirts, etc. I liked to sew the cotton knits with spandex. I made long johns for my daughter, who worked from a Boston Whaler boat on the Chesapeake Bay, MD, and my stepson liked the tights I make for him to use in the Washington winters when biking. My son worked outside in the Indiana winters and liked the tights I made for him to wear as long johns. If the serged seams held together for those articles of clothing, I believe a quilt would also.