Felt sole waders and boots — the standby of fly fishers everywhere to help prevent slipping on river-bottom rocks — are out, and rubber boots are in.
At least in Yellowstone National Park.
Reasons for the ban
The park announced the felt sole ban in a Thursday news release as a way to protect Yellowstone from aquatic invasive species.
Park spokeswoman Vicki Regula said Thursday morning that microorganisms can be found on felt-soled boots even after cleaning.
“They just really adhere to that felt,” she said.