Clothing that protects against the rain only includes garments complying with the standard for protection against rain and wind: EN 343.

This refers only to waterproof clothing or clothing with a waterproof outer layer and waterproof seams.

Based on the performance levels for this standard (which you can find in the product details), you can infer how effective the water tightness of the garment is (X) and how breathable (Y).

On the basis of these 2 parameters, the clothing is also classified into 3 classes, of which class 3 is the most waterproof and most breathable.