Rainfly: Definition, How It Works, and Pitching Tips
A rainfly is the waterproof outer layer of a tent that goes over the breathable inner body to shed rain and block wind, while creating a gap that lets condensation form on the fly rather than on you. Available in full-coverage (reaching the ground) or partial (roof-only) designs, a properly pitched, taut rainfly is what keeps a double-wall tent dry in a storm.
