Recycled Nylon has the same benefits as recycled polyester: It diverts waste from landfills and its production uses much fewer resources than virgin nylon (including water, energy and fossil fuel).
A large part of the recycled nylon produced comes from old fishing nets. This is a great solution to divert garbage from the ocean. It also comes from nylon carpets, tights, etc.
Recycling nylon is still more expensive than new nylon, but it has many environmental advantages.
A lot of research is currently being conducted to improve the quality and reduce the costs of the recycling process.