A wetsuit that smells like a damp basement after a weekend in a transition bag is wet. Bacteria and mold multiply in the lining and seams when the suit stays damp, and the odor is their byproduct. Baking soda can reduce that smell. It cannot fix the root cause: moisture left inside the neoprene.
At blueseventy, we hear this question most often after a swimmer leaves a suit in a car trunk or gear bag overnight. The suit goes in damp, comes out sour, and the first instinct is to clean harder. The better first step is to dry smarter. That shift changes how you handle every future swim.
Why Wetsuit Neoprene Holds Odor
Wetsuit neoprene allows a thin layer of water in, which your body warms to create insulation. That same thin layer, combined with the skin oils, sweat, sunscreen, and algae that collect during a lake or ocean swim, gives odor-causing microbes exactly what they need to multiply and release the sour compounds you smell later. The neoprene itself has little odor.
blueseventy wetsuits use Yamamoto neoprene in 38, 39, and 40 cell grades. Higher cell numbers mean more flexibility, which is why a race suit like the Helix feels so free in the shoulders. That flexibility also means the neoprene has many small air pockets and a lining texture that can hold water and organic material. As swim-specific suits have become thinner and more flexible over the years, they have also become more dependent on thorough drying. After a long swim, the suit needs water removed from those same places.
The problem is rarely the water you can see. It is the water trapped in the lining, cuffs, and seams after you pack the suit away. A suit left damp in a plastic bag or closed bin gives microbes moisture, warmth, and food. That is the recipe for the smell you notice later.
How Baking Soda Works on Neoprene Odor
Baking soda is sodium bicarbonate, a mild alkali. Many of the compounds that make wet gear smell sour are acidic, so baking soda can bind and neutralize them. A soak can take a smelly wetsuit from foul to nearly neutral in under an hour.
It does not kill mold spores or bacteria. A soak in baking soda water deodorizes the suit but leaves living microbes in the seams and lining if the suit stays damp. The moment moisture returns, the smell can come back. Baking soda resets the smell. The drying habit cures the cause.
For wetsuit mold smell removal, baking soda works best as a short soak. Dissolve half a cup of baking soda in a basin of cool water, turn the suit inside out, and submerge it. Agitate gently for five to ten minutes. Rinse thoroughly with cool fresh water. Do not scrub the neoprene with a baking soda paste, especially on thin, high-flex panels. The grit can abrade the outer surface.
The Rinse, Reverse, Dry Habit
The most common mistake is rinsing the outside of a suit and then hanging it right side out, because the inside lining stays damp and gives odor-causing microbes exactly the moisture they need to keep multiplying. To break the cycle, reverse the suit.
After a swim, rinse the wetsuit inside and out with cool fresh water. Gently squeeze the arms, legs, and torso to push out excess water. Then turn the suit inside out and hang it in a cool, shaded, well-ventilated spot. Let the lining dry completely before turning the suit right side out to dry the exterior. A wide hanger or padded bar prevents shoulder stretch. Thin metal hangers and clothespins pinch the rubber and can distort the fit.
Direct sun and heat degrade neoprene cells over time. Air movement does the drying work, not heat. A fan in a shaded garage works better than a sunny deck. Rinse, reverse, dry, then store dry.
A Four-Step Odor Removal Routine
If a suit already smells, use this sequence before reaching for more aggressive cleaners.
- Rinse the suit inside and out with cool fresh water. Squeeze out what you can.
- Fill a basin with cool water and dissolve half a cup of baking soda. Turn the suit inside out and submerge it. Agitate gently for five to ten minutes.
- Drain and rinse thoroughly with cool fresh water. Squeeze, do not wring.
- Hang the suit inside out to dry, then turn it right side out and dry the exterior. Check that cuffs and seams are dry before storing.
For stubborn odor in neck, armpit, or zipper areas, make a thin paste of baking soda and water and apply it to those spots for ten minutes. Rinse well. Do not scrub, and test any new treatment on an inside seam first.
Rinse and Dry After Every Swim
Rinse the suit within a few hours of leaving the water. If you can't rinse at the venue, take the suit out of your bag and turn it inside out so air reaches the lining. Do not leave it balled up in a backpack or car trunk.
Store the suit loosely folded or laid flat after it is dry. Plastic bags and closed bins trap moisture, and a hot car accelerates both microbial growth and neoprene breakdown. Never machine wash or machine dry a wetsuit. The agitation and heat break down the neoprene. A wetsuit-specific cleaner, used every few weeks, removes oils and algae that plain water misses. That reduces the food supply for odor-causing microbes and keeps the lining fresher.
blueseventy wetsuits carry a one-year warranty against manufacturing and material defects for the original owner. Odor from storage is not a covered defect. Delamination or seam failure, which can trap water and worsen smells, may be. If you find black or gray spots in the lining that survive washing and drying, or if the suit feels heavy after drying, contact us at us@blueseventy.com.
When to Retire a Suit
A smell that returns within one swim usually means the suit is not drying fully between uses. That can happen with old neoprene, damaged lining, or a suit stored in a humid space. Before retiring it, try the full dry-and-clean sequence twice. If the odor persists and the suit feels spongy or holds water in specific panels, the material may have broken down.
A visual check helps. Look for cracks, delamination, or areas where the lining has lifted. Those spots trap water. They also reduce buoyancy and flexibility, which matters for body position and stroke freedom. A damaged suit is a performance issue first and a smell issue second.
Baking soda can reset a smelly wetsuit. It cannot replace a drying habit. Rinse, reverse, dry, then store dry. Happy Swimming.
