RAIN JACKETS
VS GILETS:
WHAT'S THE DIFFERENCE?

Here's the short answer: you want both. A gilet and a packable rain jacket together weigh less than 400g, take up half a jersey pocket between them, and cover almost every weather scenario you'll meet on the road. They get confused because they live in the same place — but they're solving completely different problems, and once you understand which is which, the case for carrying both becomes obvious.

This article makes that case. We'll cover what each one actually does, when each is the right call, and why "buy one or the other" is the wrong frame.

WHAT EACH ONE IS FOR

The gilet — also called a wind vest — is a sleeveless, packable layer designed for wind protection. It blocks wind from your core without adding sleeve weight or restricting heat escape from your sides. Most gilets offer minimal water resistance at best; they're not designed for rain. The gilet is the most versatile piece in a cyclist's wardrobe and earns its place in a back pocket from March to November — exposed descents, cool morning starts, the kind of borderline conditions where a full jacket would be too much but bare arms wouldn't be enough.

A proper cycling rain jacket is something else entirely: waterproof or highly water-resistant, with sleeves, designed to keep you dry when it's actually raining. The best ones are wind-resistant too, very packable, and breathable enough not to turn into a sauna at moderate effort. They're heavier and bulkier than a gilet, but genuinely necessary when conditions get wet.

SIDE BY SIDE

The two pieces aren't interchangeable, and the spec sheets show why:

The combined weight is so low that on uncertain days, the question really is "why wouldn't you carry both?" Below 400g total — about the weight of a full bottle of water — for two pieces that solve fundamentally different problems.

HOW THE TWO WORK TOGETHER

The standard approach at the pro level on variable spring or autumn days: gilet on for the cold exposed sections, off when you're climbing. Rain jacket stays packed unless it actually rains. If a shower hits, the rain jacket comes out. If the wind picks up but it's still dry, the gilet goes on. Two tools, two jobs, no compromise.

When the gilet alone is enough

Temperatures between 12–22°C with noticeable wind. Rides that start cold and warm up. Routes with mixed exposed and sheltered sections. Long descents on warm days. The gilet on its own is right roughly six months of the year in temperate climates — which is exactly why it earns the back-pocket spot first.

When the rain jacket is essential

Sustained rain, especially in cool conditions. Below 15°C and wet, a rain jacket goes from optional to required — the windchill cost of a soaked jersey is genuinely dangerous on a long ride. Our temperature guide goes deeper on what "wet at 8°C" actually demands kit-wise.

What to look for in a packable rain jacket

Packability matters because you'll often start without it and pull it out mid-ride. A jacket that compresses into its own pocket and fits in a jersey pocket is worth paying more for. Breathability ratings tell you how much moisture vapour can escape — the higher the number, the more comfortable it is at effort. Taped seams matter in sustained rain.