Materials in the scene leave alot to be desired
The scene consists of 3 main objects, the ring the reflective bands and the rope. the rope is a path the rest are geometry with some modifiers applied. The scene has a reasonable polycount when subvision surfaces arent in affect.

Description from wikipedia - I thought it may help searches:
The lifebuoy is usually ring- or horseshoe-shaped and has a connecting line allowing the casualty to be pulled to the rescuer in a boat. They are carried by ships and are also located beside bodies of water that have the depth or potential to drown someone.