10 Star Trek: TNG Facts You Probably Didn't Know
6. Costume Troubles
TNG introduced new uniforms that were meant to evoke a similar feeling to the originals series. When possible, no buttons, zippers or pockets were visible: not being able to see how the clothing fastened was part of the sci-fi aesthetic.
In The Original Series, uniforms were initially made out of velour, but this fabric ripped easily and couldn't survive dry cleaning. By the third season the switch was made to nylon.
TNG had a similar struggle with fabric. Initially spandex was used for the uniforms, but it was uncomfortable for the actors. Spandex retains heat and odors and can only stretch in one direction. The lack of lengthwise stretch caused back pain in many of the actors. Patrick Stewart's chiropractor told him the fifteen hour shoots in uniform were going to do permanent damage.
In season three, TNG switched their uniforms to wool... less painful, but difficult to move in. Eventually the decision was made to retain the fabric, but switch the men's uniforms to a two-piece jumpsuit, which allowed more range of motion. Marina Sirtis and Gates McFadden continued to suffer through the uncomfortable, more form-fitting version of the design with the added pressure to maintain their weight.
One of the lasting legacies of all those costume troubles was what became known as "The Picard Maneuver" the move Stuart would make to adjust his uniform so it wouldn't bunch or ride up.