A lot of that litter contains
especially durable plastics, such as polyethylene and polypropylene, which are designed to survive in marine environments.
Not exact matches
These rings are almost always made of
durable aluminum or another type of metal, but sometimes they may be made of
plastic —
especially if your sling is designed to be waterproof.
The phone itself is not
especially durable, and isn't water resistant; but the body is made from
plastic and metal, so should resist average wear and tear from regular use.