Tests are not normally needed for someone who has sleep related groaning. Your doctor may have you do an overnight sleep study if your problem is severely disturbing your sleep. This study is called a polysomnogram. It charts your brain waves, heart beat, and breathing as you sleep.
A gingham shirt is a menswear classic and this Gentlemans Corner Felix shirt is no exception. This classic button down style has a slim fit in the upper body with a more generous cut around the stomach.
Gingham is made of carded or combed, medium or fine yarns, where the coloring is on the warp yarns and always along the grain. Gingham has no right or wrong side regarding color. Along with muslin, gingham is often used as a test fabric while designing fashion, or used for making an inexpensive fitting shell prior to making the clothing in fashion fabric.