Waterproof nonwoven fabric can vary in terms of breathability, and whether it is breathable or not depends on the specific design and construction of the fabric. It's possible to have waterproof nonwoven fabrics that are breathable to some extent, while others may prioritize waterproofing over breathability.

Breathability is an important consideration in applications where moisture management and comfort are essential, such as outdoor clothing, sportswear, and medical textiles. Breathable waterproof fabrics are designed to allow moisture vapor (e.g., sweat) to pass through the fabric while preventing liquid water from entering. This is typically achieved through the use of special coatings or membranes that are microporous, allowing water vapor to escape but blocking liquid water.

Common technologies used to create breathable waterproof fabrics include:

Micro-Porous Membranes: These membranes have tiny pores that are too small to allow liquid water droplets to pass through but large enough to permit the passage of water vapor. Gore-Tex is a well-known example of a breathable waterproof membrane.

Hydrophilic Coatings: Some fabrics are treated with hydrophilic coatings that attract moisture, causing it to spread out and evaporate through the fabric.

Air Permeable Membranes: Some breathable waterproof fabrics feature an air-permeable membrane that allows air to pass through while preventing liquid water from entering.

DWR (Durable Water Repellent) Finishes: DWR finishes can be used in conjunction with breathable membranes or coatings to enhance water repellency while maintaining breathability.

Layering: In some cases, breathability is achieved by using a multi-layered fabric construction, with each layer serving a specific purpose, such as moisture-wicking and waterproofing.

It's important to note that not all waterproof nonwoven fabrics are breathable. Some fabrics prioritize waterproofing to create a complete barrier against moisture, and these may not be as breathable. The choice between breathability and waterproofness depends on the intended use of the fabric. For activities where breathability is crucial, such as outdoor sports or medical applications, it's essential to select a fabric designed to provide both waterproofing and breathability to ensure comfort and performance.

When shopping for waterproof nonwoven fabric, it's a good idea to check the manufacturer's specifications and product descriptions to determine the level of breathability offered by the fabric. Specific brands and technologies are known for their breathability, so it's worth researching and consulting with suppliers to find a fabric that suits your needs.