Alchemy Freediving Neck Weight*Neck Weights are custom made, so please expect an extra week for your order to ship* Featuring a stunning design with an uncompromising, fluid fit, the Alchemy Silicone Neck Weight promises the optimal freediving experience. New version features a laser engraved logo. Description: The Alchemy silicone freediving neck weight is designed to help you dive deeper, faster, and safer. Simply push on its sides, and watch it form with incredible precision