Fabric World (ぜんまいヶ原店, Zenmaigahara-Ten, Field of Royal Ferns' Store) is a small area accessible from a hidden path in the dressing room in Urotsuki's Dream Apartments.
Fabric world is an area featuring islands made of a gray material with large needles stuck through the ground, smaller ones sewing underneath, and various fabric-related machines scattered around.
It is comprised of two areas, with a door at the end of the first leading to the second area. The second area is filled with giant mannequin body parts and floating doors scattered around, with the occasional needles here and there.
Dotted sparsely around the second area are non-oversized mannequins, with shirts on them that sway in the wind. Equipping the Glasses effect near one of them will reveal the head of the mannequin.
There is a walking version of the lady from the dressing room in the northeast of the second area, who will teleport you to Guts World, inside the Gray Building. Sometimes she may be walking around just out of reach to interact with her.
Nexus → Urotsuki's Dream Apartments → Fabric World