Ski jackets and pants are often labelled 2L, 2.5L or 3L. The number describes how the waterproof fabric is built, and it changes how a jacket feels, how much it weighs and how well it layers. Here is what each one means and how to choose.
What the "L" stands for
"L" means layers, and it refers to the layers bonded together in the fabric itself, not the number of jackets you wear. A waterproof fabric usually has up to three parts:
- Face fabric: the outer material you see. It is often treated with a DWR (durable water repellent) finish so water beads up and rolls off.
- Membrane or coating: a thin waterproof, breathable layer that blocks water from outside and lets some moisture from sweat escape.
- Backer: a thin inner layer that protects the membrane from wear and body oils.
2-layer (2L)
In a 2L fabric, the face fabric is bonded to the membrane, and the membrane is protected by a separate, loose lining, usually mesh or a smooth taffeta. Insulated jackets are often built this way, with the insulation between the shell and the lining.
- Pros: soft and quiet, comfortable next to the skin, often more affordable, easy to combine with insulation.
- Cons: the loose lining adds weight and bulk, and the jacket can take longer to dry.
2.5-layer (2.5L)
A 2.5L fabric replaces the full backer with a thin printed or sprayed protective layer. It is light and packable, and you will see it more often on rain jackets than on ski wear.
- Pros: very light and compact.
- Cons: less durable and can feel clammy against the skin.
3-layer (3L)
In a 3L fabric, the face fabric, membrane and backer are laminated into a single material. There is no loose lining, so the jacket moves as one piece.
- Pros: durable, less bulky, layers well over a hoodie or fleece, and dries quickly. It works well for active riding where you warm up and cool down.
- Cons: usually a little stiffer and louder than a lined 2L jacket, and often more expensive. A 3L shell has no built-in warmth, so you control warmth with your layers, although some 3L pieces add insulation inside.
Which one should you choose?
- Mostly resort days and you feel the cold: an insulated jacket (2L or 3L) keeps things simple.
- Park laps, spring riding or you run warm: a 3L shell with layers you can add or remove.
- Riding in every kind of weather: a 3L shell plus a warm mid layer covers the widest range of days.
- On a budget or riding a few days a year: a 2L jacket is a sensible choice.
Layers are not the same as waterproofing
The number of layers tells you how the fabric is built. It does not tell you how waterproof it is. A 2L jacket can have a higher waterproof rating than a 3L jacket, and the other way round. Always check the waterproof and breathability ratings too; our guide to what 10K and 20K waterproof ratings mean explains the numbers.
How to tell what you are buying
Look for "2L" or "3L" in the product name or fabric details. Many Hellystudio jackets, pants and hoodies are 3-layer; you will usually see "3L" in the product name or the fabric details on the product page, and the waterproof rating under CORE FEATURES.
Looking after a waterproof jacket
Whatever the construction, follow the care label. Dirt and body oils reduce breathability, and a tired DWR finish makes the face fabric soak through even when the membrane is still waterproof. Gentle washing and refreshing the DWR, as the label allows, keeps any jacket working longer.
Shop this guide: Ski Shell Jackets · Ski Jackets · Baggy Ski Pants
Read next: What 10K and 20K waterproof ratings mean · Baggy Fit Size Guide