Enter the world of submission with the Intoyou Black Shadow line, a line for those bravest and most passionate about BDSM. This necklace is adaptable and has a metal chain so you can take your partner wherever you want, or to take you, depending on the moment. The body of the necklace is made with vegan body, a soft and silky but firm material, perfect to keep your sub in place. The chain and the metal hook are nickel free and are very resistant, in case your partner / submissive ever reveals herself to her master. Features: Vegan leather High quality neoprene Metal chain 100% nickel free High-quality manufacturing Sturdy snap hooks Adaptive collar Safe and nice