A special blanket that protects the creature hiding underneath it.
This is a 10 ft. square blanket. A creature with one can cover themselves with it as an action. The blanket and creatures covered this way remain unaffected by spells, attacks, effects, etc. that would normally affect them. The fabric appears transparent to those covered by it.
Doing anything other than the Ready action while covered by the Nimble Fabric causes the effect to end until the creature uses an action to reapply it.