Merino wool swimwear costs more than a polyester suit. Here's an honest look at what you're actually paying for — and whether it's worth it for you.
What you're paying for
Merino wool is a premium natural fibre, and the process of turning it into swimwear — fine enough to wear against skin, durable enough to handle chlorine and saltwater — is more involved than spinning polyester from plastic bottles. The price reflects the material, not a margin exercise.
Swimm uses 96% merino, fine enough to wear against skin without irritation. That specification matters. Coarser wool would itch and degrade faster. Getting to a fabric that's genuinely soft, genuinely functional in water, and genuinely durable takes more. It's also why not every brand attempting wool swimwear gets it right — the fibre quality is everything.
What you get that polyester doesn't offer
- Temperature regulation in and out of the water — merino manages heat in both directions, which is why it works as well in a sauna as it does in the ocean
- No microplastic shedding — every wash of a synthetic suit releases plastic microfibres into waterways; merino biodegrades
- Natural odour resistance from lanolin, without chemical treatments
- A suit that holds its shape over years, not seasons
The honest trade-offs
Merino requires slightly more care than polyester — a cold rinse after every swim, hand wash or gentle cycle, lay flat to dry. It can briefly sag when saturated with water before recovering its shape. And it costs more upfront.
What it won't do is pill, go bobbly, or lose its elasticity the way synthetic swimwear does after a season of chlorine exposure. The longevity is real, not a marketing claim.
The cost per wear argument
A $30 polyester swimsuit that needs replacing every season costs more over time than a well-made merino suit that holds up to regular, repeated use. That's not a rationalisation — it's how quality goods actually work. The upfront cost is higher; the ongoing cost is lower.
So, is it worth it?
If you're buying swimwear to replace every season, probably not — that's not what this is. If you want one well-made suit that performs better, lasts longer, and doesn't shed plastic every time you use it, then yes.
It's worth it for the same reason good footwear or quality linen is worth it — the cost per wear over time is lower, and what you're wearing is genuinely better.