Get yourself a pair of Maltese cross fishnet tights in black.
 
These tights are free size, fits  height155 - 175 cm  and should hold up 90kg wieght.
 
100% spandex
 
Care instructions: 
1 Use a mesh bag and machine wash on hand wash with cold water.
or
2Hand wash with cold water and mild detergent .
 
Air dry flat