Looking for IEM recommendations.

Budget - <50 CAD ideally.
Source - Field recorder.
Isolation is a must.
Tonal balance doesn't matter much, though neutral is better.

Looking for a combination of rugged AND cheap, ideally. They need to withstand all weathers. In particular, Canadian cold (that means drastic changes in temperature that may be hard on the wire as well as condensation on the drivers.) I don't want to have to babysit them, so cheap is the first criteria, rugged 2nd.