Breathability is one of the key characteristics for outdoor clothing and gear, allowing sweat vapor molecules to escape while at the same time keeping liquid water, such as raindrops from entering.

Breathable fabrics use a membrane with microscopic pores that are small enough to prevent liquid water from seeping through, yet large enough for moisture vapor molecules to escape. Here are the top breathable shells for hiking, backpacking and other active outdoor pursuits.

1. Gore-Tex

Gore-Tex fabric has become legendary due to its durability, breathability and water resistance. Engineered from expanded polytetrafluoroethylene (commonly referred to as Teflon), Gore-Tex stands out as an amazing feat of modern technology.

ePTFE’s magic lies in its complex microporous structure. When stretched, the material expands, creating an intricate network of pores which repel liquid water and wind while remaining 700 times larger than moisture vapour molecules to allow perspiration out.

Gore-Tex gear bonded via lamination is waterproof and breathable, however for optimal performance it must be regularly washed and maintained to prevent degradation of sealing properties and to preserve performance. Regular seam cleaning helps preserve this seal’s effectiveness over time.

3. NeoShell

NeoShell is one of Polartec’s premier waterproof membrane technologies. This elastic fabric makes NeoShell suitable for inclusion into stretchy garments that fit tight against the body, with breathability ratings surpassing even GORE-TEX.

NeoShell stands out from other waterproof membranes by prioritizing both high hydrostatic head ratings and breathability; its breathability rating of 30,000g/m2/24h effectively moves basketball-sized volumes of sweat away from your body, keeping it dry, cool, and comfortable.

Fabric made of polyurethane can produce toxic emissions during production and contribute to plastic pollution when discarded, however some manufacturers such as Mountain Equipment and Pearl Izumi prefer OEKO-TEX certified NeoShell fabrics instead.

4. ePTFE

Expanded polytetrafluoroethylene (ePTFE), more commonly referred to as Gore-Tex material, is the mainstay of waterproof-breathable membranes used for outdoor exploration and recreation. This membrane prevents liquid water from penetrating but allows water vapour through, offering outdoor enthusiasts comfort during their adventures.

Extrusion and stretching ePTFE creates an amorphous locking process, which results in two key properties of this material – texture and porosity – being defined. Textured material can be ideal for gasket applications while porosity plays an essential part in membrane and filter applications.

Asia Pacific holds immense potential for the ePTFE market due to rapid industrialization and infrastructure development, but competitors from alternative materials or technologies pose a formidable threat for market players.

5. Conduit

Electrical wires and cables should ideally be run through conduit to protect them from fire and injury. Conduit is a rigid or flexible tubing that holds and safeguards electrical wiring systems.

Conduit comes in various varieties, each offering their own set of advantages and drawbacks when used for residential applications. To determine what type and size to use in any particular instance, consult the latest edition of the National Electrical Code; some jurisdictions mandate specific conduit types or sizes over others for certain applications.

Rigid metal conduit (RMC) is the heaviest and thickest option. Suitable for exposed or concealed installation, RMC can also be galvanized or electro-galvanized depending on its intended use.

6. Pertex

Pertex fabric is a light yet strong synthetic fabric widely used for outdoor apparel, known for its durability, strength, and precision weaving.

Fabric made with tightly woven threads and a membrane to form a waterproof barrier against wind, rain and snow is also highly breathable, helping keep you comfortable on your journeys.

Pertex created their innovative fabrics to enable people to experience epic and everyday adventures in nature. Montane uses these lightweight, packable fabrics in our jackets, apparel and accessories so we can stay outdoors longer on more intense adventures.