If you've ever watched an Olympic swimming event, you've probably noticed something curious: many swimmers appear to be wearing two swim caps stacked on top of each other. It's not a fashion statement or a mistake. The double cap technique is a deliberate, strategic choice.
So why do swimmers wear two caps? Let's break it down.
The Double Cap Technique, Explained
The double cap swimming method is exactly what it sounds like. A swimmer pulls on one swim cap, positions their goggles over it, then pulls a second cap on top. The result is a sleek, hydrodynamic profile with goggles sandwiched securely between two layers of material.
This isn't a quirky habit. It's standard practice at nearly every elite-level competition, from NCAA championships to the Olympic Games.
Why Do Swimmers Wear Two Caps? The Four Key Reasons
1. Securing Goggles in Place
By placing goggles between two swim caps, the goggle straps are locked firmly against the head. The outer cap presses them down flat, eliminating any chance of the straps catching water or shifting during a race.
In a sport where a single hundredth of a second separates gold from silver, a goggle malfunction is a nightmare scenario.
2. Reducing Drag
Goggle straps, even thin ones, create measurable drag when exposed on the back of the head. With the double cap technique, the outer cap creates a smooth, unbroken surface from forehead to nape. No straps fluttering, no buckles catching water.
3. Keeping Hair Contained
The first cap gathers and compresses the hair. The second cap acts as a failsafe, pressing everything tighter and ensuring nothing escapes during the race.
4. A Smoother, More Hydrodynamic Profile
Two caps together conform more tightly to the shape of the skull than one cap alone. The inner cap smooths out the hair, and the outer cap smooths out the inner cap, goggles, and any remaining irregularities.
What Types of Swim Caps Work Best for the Double Cap Method?
- Inner cap: A standard latex cap. Latex is thin, grippy, and clings tightly to the hair.
- Outer cap: A silicone swim cap. Silicone is smoother, more durable, and glides through water more easily than latex.
The latex-under-silicone combination is the gold standard at the competitive level. The latex grips; the silicone glides.
If you're looking for a quality silicone outer cap, CutWave swim caps are designed with exactly this use case in mind — durable silicone construction with a comfortable fit that works perfectly as the outer layer in a double cap setup.
Do You Need Two Swim Caps for Recreational Swimming?
Honestly? Probably not. If you're swimming laps at your local pool, a single well-fitting silicone cap will serve you perfectly well.
That said, there are situations where recreational swimmers might benefit from two caps:
- Open water swimming: Rough conditions make goggle security more important.
- Race day at any level: Even at a local masters meet, the double cap gives you confidence.
- Very long hair: A latex base layer underneath can make a noticeable difference in comfort and fit.
How to Put On Two Swim Caps: A Quick Guide
- Start with dry hair. Wet hair is slippery and harder to tuck in.
- Pull on the latex cap first. Tuck all hair inside, smoothing out air pockets.
- Position your goggles. Place them over the first cap, adjusting the fit and tightness.
- Pull the silicone cap over everything. Start from the front and roll it back over the goggles and straps.
- Do a final check. Make sure no hair is poking out and the goggles feel secure.
Race Day Swim Cap Tips
- Choose a cap that fits your head size. An overly tight cap causes headaches and distraction.
- Don't put your cap on too early. Put it on 5-10 minutes before your event, not an hour before.
- Keep your nails trimmed. Nothing ends race prep faster than puncturing your cap.
- Bring a backup. Caps tear. CutWave caps are affordable enough to keep an extra on hand.
Frequently Asked Questions
Why do Olympic swimmers wear two swim caps?
Olympic swimmers wear two swim caps to secure their goggles between the layers, reduce hydrodynamic drag, and create the smoothest possible head profile.
Does wearing two swim caps actually make you faster?
Yes, though the difference is marginal. The drag reduction from a double cap setup can shave fractions of a second off race times.
Can I use two silicone caps instead of latex and silicone?
You can, but it's not ideal. Two silicone caps tend to slide against each other. A latex inner cap grips the hair and the silicone outer cap much more effectively.
Is the double cap technique only for competitive swimmers?
Not at all. Open water swimmers, triathletes, and even fitness swimmers who want extra goggle security can benefit from wearing two swim caps.