Waterproof Ratings Explained
Water column (mm): How much water pressure the fabric resists before leaking. 10,000mm handles moderate rain. 20,000mm+ handles heavy, prolonged downpours. Gore-Tex fabrics typically exceed 28,000mm.
MVTR (g/m²/24hr): Moisture vapor transmission rate — how much sweat vapor passes through. Higher = more breathable. 10,000 is minimum for cycling. 20,000+ prevents internal condensation on climbs. Gore-Tex Active achieves 25,000+.
Quick Comparison
| Jacket | Fabric | Weight | Packable | Price |
|---|---|---|---|---|
| Rapha Pro Team Gore-Tex | Gore-Tex Active | 135g | Yes | $320 / €300 |
| Castelli Idro 3 | Gore-Tex Infinium | 148g | Yes | $280 / €260 |
| Assos Equipe RS Rain | DWR membrane | 120g | Yes | $340 / €310 |
| Gore Endure Jacket | Gore-Tex Active | 170g | No | $250 / €230 |
| Castelli Squall Shell | Taped membrane | 98g | Yes | $200 / €185 |
| dhb Aeron Lab Rain | 3L membrane | 160g | Yes | $130 / €120 |
Editor’s Picks
Best Overall
Rapha Pro Team Gore-Tex
$320 · 135g
Best Value
dhb Aeron Lab Rain
$130 · 160g
Lightest
Castelli Squall Shell
$200 · 98g
Individual Reviews
Rapha Pro Team Gore-Tex
The benchmark. Gore-Tex Active fabric at 135g provides the best waterproof-to-breathability ratio available. Fully taped seams keep water out at every stitch point. The race cut sits close to the body without flapping at speed. Hours of heavy rain, still dry inside.
The fit runs slim — size up if wearing over a jersey. Cuff sealing is good but not perfect; heavy rain eventually wicks through at wrists after 2+ hours. At $320 it’s the most expensive option, but the construction justifies the price.
Verdict: Best cycling rain jacket available. If you ride in rain frequently, this is the one investment that pays back every wet ride.
Castelli Idro 3
Gore-Tex Infinium is technically water-resistant, not waterproof — it can wet out in prolonged heavy rain. For 90% of wet rides (light-to-moderate rain, 1–2 hours), it’s more than adequate. The advantage: Infinium breathes better than full Gore-Tex, making it usable on rides where rain is possible but not certain.
The Idro 3 is the heir to the legendary Gabba — Castelli’s game-changing rain jersey. Stretchy fabric, aero fit, packable. At $280, it sits between the Squall Shell and Rapha in both price and protection.
Verdict: Best for unpredictable weather. Carries like a gilet, protects like a jacket. The “just in case” rain layer.
Assos Equipe RS Rain
The lightest full rain jacket at 120g using a DWR-coated membrane instead of Gore-Tex. Packs to the size of a fist. Breathability is excellent — better than Gore-Tex for high-intensity efforts. The DWR coating wets out faster than Gore-Tex in heavy rain, but for most rides under 2 hours it holds.
At $340 you’re paying the Assos tax. The construction is impeccable and the fit is race-precise. Refreshable DWR means washing with Nikwax restores water repellency.
Verdict: Best packability and lightest weight. Premium price for premium lightweight engineering.
Gore Endure Jacket
Gore’s own-brand jacket using Gore-Tex Active. More relaxed fit than the Rapha with longer back coverage. At 170g it’s heavier and doesn’t pack as small, but the waterproofing is identical. The best all-day rain jacket for riders who prioritize coverage over race fit.
Verdict: Best for long rides in heavy rain. The relaxed fit covers your lower back from spray. More practical than racey.
Castelli Squall Shell
At 98g for a size large, the Squall is absurdly light. It packs into its own pocket smaller than a banana. The fully taped membrane is waterproof for short bursts (30–60 minutes) but wets out in prolonged rain. Best as an emergency layer you always carry.
Verdict: The “always in your pocket” jacket. Not for all-day rain, but perfect for unexpected showers on summer rides.
dhb Aeron Lab Rain
The budget pick at $130. A 3-layer membrane with taped seams that holds up well in moderate rain for 60–90 minutes. Breathability is adequate but noticeably behind Gore-Tex on climbs. The fit is good for the price, with reflective details for commuting.
Verdict: Best value rain jacket by a mile. Does the job for most rides. Replace it every 2 seasons when the DWR dies.
What We’d Buy
Best overall: Rapha Pro Team Gore-Tex. The best fabric, best construction, best protection. Worth it if you ride in rain weekly.
Best value: dhb Aeron Lab Rain. $130 for functional rain protection. The smart choice if rain is occasional.
Always carry: Castelli Squall Shell. 98 grams in your pocket. The emergency layer you never regret packing.
Rain or shine, your training adapts
Paincave adjusts your plan whether you ride in the rain or take a rest day. The engine works with your life, not against it.