They keep keys at the surface by using a buoyant body or a floating wristband made from flotation materials; this added buoyancy prevents attached keys from sinking and makes them easier to spot and retrieve.
Common attachments include split rings and key rings, metal clasps, and swiveling snap hooks—often fitted to lanyards or wristbands for secure, easy retrieval.
Bright, high‑visibility colors and contrasting designs are commonly used so floating keychains stand out on the water surface and are easier to spot.
Neoprene wristband keychains are described as waterproof, wear‑resistant, soft, and comfortable on the wrist; they secure keys to your wrist or backpack during water activities.
Some include a buoyant floating wristband, a high‑pitch emergency whistle, and a non‑tangling swiveling snap hook to aid quick retrieval and signaling.