Cargo Features

[dependencies]
tokio-rustls = { version = "0.25.0", default-features = false, features = ["early-data", "logging", "ring", "tls12"] }
default = logging, ring, tls12

These default features are set whenever tokio-rustls is added without default-features = false somewhere in the dependency tree.

early-data
logging default

Enables logging of rustls

ring default

Enables ring of rustls

tls12 default

Enables tls12 of rustls

tokio-rustls has 5 features without comments.