Short answer: polyester for racing, hot weather, and anything with a custom team design. Merino for cold, for long days at moderate intensity, and for multi-day trips where you're wearing the same jersey twice.
We make both, and we sell far more polyester — for a reason that has as much to do with printing as performance. That constraint is the part most comparisons leave out, so let's start there.
The constraint nobody mentions: you can't sublimate wool
Sublimation works by converting dye to a gas that bonds with polyester polymer chains. It's a chemical reaction with a synthetic fiber, and wool doesn't participate. There's nothing for the dye to bond to.
That means a full-color custom team design — sponsor logos, gradients, panel color-blocking, individual names — is a polyester conversation. Wool jerseys can carry a logo through other decoration methods, but you're not getting an all-over sublimated club kit in merino.
For a club or school program, this usually settles the question before performance enters into it. If you want the whole team in matching custom kit, you're ordering polyester. Merino tends to show up as an individual purchase or a small add-on to a store, in a simpler design.
How each one handles sweat
This is the core functional difference and it's more interesting than "both wick."
Polyester moves moisture across the surface. The fibers are hydrophobic — they don't absorb water — so sweat is pushed along the fiber and spread across a wide surface area to evaporate fast. That's why a polyester jersey feels dry quickly and why it dries in an hour on a hanger. The trade-off is that when you stop, evaporation keeps going and you get cold faster.
Merino absorbs moisture into the fiber. Wool holds a substantial share of its weight in water before it feels wet against the skin, and the absorption releases a small amount of heat. Practically, that means merino feels comfortable across a wider temperature band and doesn't produce the sudden chill at the top of a climb or at a coffee stop. The trade-off is that it holds that water — a soaked merino jersey is heavy and slow to dry.
Neither is better. They're solving the problem differently, and which one you want depends on whether your ride has a lot of stop-start temperature swing.
Where merino wins
Cold and shoulder-season riding. The wider comfort band is real. On a 40-degree morning that becomes 60 degrees by noon, merino handles the range better than a polyester jersey plus layers.
Odor. This isn't marketing. Wool's structure and its natural lanolin content make it far less hospitable to the bacteria that produce smell. A merino jersey can be worn several days running and stay socially acceptable. Polyester cannot, full stop.
Multi-day trips and bikepacking. Directly downstream of the odor point. If you're carrying two jerseys for a week, merino is the obvious call.
Next-to-skin comfort in the cold. Merino base layers are excellent, and this is where wool earns its place even in kits that are otherwise polyester.
Where polyester wins
Racing and hard efforts. Faster moisture transport, less weight when soaked, and it holds an aerodynamic cut better. Every skinsuit and race jersey is polyester for good reasons.
Hot weather. Fast evaporation is exactly what you want at 90 degrees. Merino in real heat is a compromise.
Durability. Polyester takes abrasion better, resists snags better, and doesn't have merino's vulnerability to moths and to pilling at contact points. A well-treated polyester jersey outlasts a merino one, usually by a lot.
Cost. Merino is significantly more expensive per garment, which matters when you're outfitting thirty riders rather than one.
Custom design. Covered above, and for team kit it's usually decisive.
Blends
Most merino cycling jerseys aren't pure wool. A common construction is merino blended with a synthetic — nylon or polyester — at somewhere around 80/20 or 85/15.
The synthetic adds tensile strength, which addresses merino's biggest weakness, and improves drying time and shape retention. You give up a little of the odor resistance and a little of the thermal range. For most riders a blend is the more practical garment than pure merino, which is why blends dominate the category.
Check the ratio when you're comparing. "Merino jersey" covers everything from 100% wool to a mostly-synthetic fabric with enough wool in it to put on the label.
Care is genuinely different
Worth knowing before you buy, because merino punishes the polyester routine.
Polyester: cold, gentle, inside out, no fabric softener, hang dry. Forgiving.
Merino: cold, wool-safe detergent, minimal agitation, and dry flat rather than hanging — wet wool stretches under its own weight and a hung merino jersey can come out longer than it went in. Never a dryer; heat felts wool irreversibly. And store it clean, because moths are attracted to the residue in worn wool, not the wool itself.
If you're putting merino in a team store, send the care note along with it. It's a different routine from the rest of the kit and it's worth the thirty seconds of explanation up front.
What this means for a team order
For most clubs and school programs the practical answer is a polyester kit with merino as an optional extra rather than the base.
Put the sublimated jersey, bibs and accessories in the store as the core kit — that's what makes the team look like a team, and it's what handles race day and summer. If you have riders doing long cold-weather miles, adding a wool long sleeve or a merino base layer as an option covers them without forcing the cost onto everyone.
The base layer is the highest-value merino item for most programs. It's worn under the kit, so it doesn't need to carry the design, and it's where wool's thermal and odor advantages do the most work per dollar.
Common questions
Is merino wool good for cycling?
Yes, particularly in cold and variable conditions and on multi-day rides. It's less suited to racing and hot weather.
Does merino wool make you hot in summer?
It's more breathable than people assume, but it dries slowly, so in real heat a lightweight polyester jersey is the more comfortable choice.
Can you get custom printed merino jerseys?
Not with full sublimation — the dye needs polyester to bond with. Merino can carry simpler decoration, but all-over custom team designs are a polyester product.
How long does a merino jersey last?
With proper care, several seasons, though it's less abrasion-resistant than polyester. Blends last noticeably longer than pure merino.
Do you need to wash merino after every ride?
No, and that's the main appeal. Airing it out between rides is often enough, which is why it's the standard choice for touring.
Building a kit for a club and want to work out where merino earns a slot? Tell us about your riders and your season.