Waterproof Membranes
Membranes keep rain out while letting moisture vapour escape.
Waterproof-breathable membranes (like those used in GORE-TEX and similar technologies) block rain from the outside while allowing moisture from your body to escape. For casual wear, that means you stay dry in showers without overheating when you’re walking, commuting, or wearing layers.
Why it matters for casual wear: If a jacket doesn’t breathe, you can feel clammy even in light rain, especially if you’re moving briskly or stepping between warm indoor spaces and cool outdoor air.
Two-Layer vs Three-Layer Construction
Layer count describes how the waterproof membrane is built into the fabric.
Two-layer jackets bond the membrane to the outer fabric and add a separate lining inside for comfort. They’re often ideal for casual wear because they feel softer and more "everyday", while still offering dependable rain protection.
Three-layer jackets sandwich the membrane between the outer fabric and an inner scrim, creating a tougher, more stable build. They can feel more "technical" but often deliver better long-term durability and more consistent performance in heavier rain.
Why it matters for casual wear: Two-layer builds usually win on comfort and value. Three-layer builds win on durability and long-term weather performance if you’re regularly out in rough conditions.
Hydrostatic Head (Waterproof Rating)
Hydrostatic head measures how waterproof a fabric is.
Measured in millimetres (mm), hydrostatic head indicates how much water pressure a fabric can withstand before leaking. For example, a 10,000mm rating means the fabric can resist the pressure of a 10-metre column of water.
For casual wear: 5,000–10,000mm is often enough for everyday showers and short exposure. If you regularly deal with heavier rain, wind, or longer time outside, 10,000–15,000mm+ adds reassurance.
RET (Breathability Rating)
RET indicates how easily moisture vapour escapes through a jacket.
RET stands for Resistance to Evaporative Heat Transfer. Lower numbers mean better breathability. For casual wear, breathability keeps you comfortable when you’re walking briskly, carrying a bag, or moving between outdoors and heated indoor spaces.
For casual wear: RET 6–12 is a strong everyday range. Higher values can still work for slower-paced use, especially in colder weather, but may feel warmer and less airy indoors.
Packability & Weight
Packability describes how easy a jacket is to carry when it's not being worn.
A packable waterproof is handy for commuting and travel: it lives in your bag until the rain hits. Ultralight jackets are easy to carry, while slightly heavier options often feel more durable and comfortable for frequent use.
General guide: Many casual waterproofs sit around ~200–400g depending on fabric, length, and features. Lighter suits travel and occasional use; heavier often suits regular wear and rougher conditions.
PFC-Free DWR
DWR helps rain bead and roll off the outer fabric.
DWR (Durable Water Repellent) stops the face fabric from soaking up water, helping the jacket stay lighter and breathe better in wet weather. Many brands now use PFC-free DWR to reduce environmental impact while maintaining reliable repellency.
Good to know: If your jacket "wets out", it often means the DWR needs cleaning and reproofing — not that the waterproof membrane has failed. Refreshing DWR helps comfort in everyday rain.
2026 update
Lower-impact waterproofing & everyday comfort upgrades
For 2026, casual waterproofs continue moving toward PFC-free DWR and more recycled face fabrics, while brands refine the feel of everyday shells — softer linings, quieter fabrics, and cleaner styling that works for commuting and travel.
When choosing a modern casual waterproof, prioritise the comfort features you'll actually notice day-to-day (lining, collar, hood fit). Keep it clean and reproofed so it stays breathable and water-shedding through the wet months.