These figure-8 rings are forged from aircraft-quality anodized aluminum with a tremendous breaking strength. They are designed for rock climbing but avid babywearers have found another use for them - create a wrap hammock or swing (without destroying the ends of your wrap). Simply thread the wrap through the big opening and use the smaller to attach a rope, then simply hang your wrap from anywhere you please. For a swing, one may suffice, but for a hammock, one will need two rings. Available in black only.