How to Put a Swim Cap on Long Hair: A Step-by-Step Guide for Keeping Hair Dry

Updated November 2026

Learning how to put a swim cap on long hair takes a little patience, but the method is simple once you know the order of steps. You will gather and smooth your hair, tuck it into a neat bun or braid, and then stretch the cap over the bundle without tearing it or leaving strands exposed. Done right, the cap sits flat and keeps most of your hair dry for the whole session.

Prepare Your Hair Before the Cap Goes On

Preparation makes the difference between a cap that slides on smoothly and one that rips at the edge. Start with hair that is slightly damp, not dripping wet, because it is easier to control and less likely to tangle. Remove clips, elastics, and hair ties, then detangle with a wide-tooth comb from the ends up to the scalp.

Shopping for one? See our guide: 6 Best Swim Caps with Long Hair for Women and Men (2026).

Apply a small amount of conditioner or a bit of silicone-free detangler through the lengths if your hair is thick or curly. Work it through, then gather everything at the nape of your neck.

How to Put Long Hair in a Swim Cap, Step by Step

Once your hair is detangled, follow these steps in order:

1. Twist your hair into a loose rope, then coil it into a low bun at the back of your head. A low bun sits flatter under the cap than a high one.
2. Secure the bun with two or three bobby pins or a soft elastic. Avoid metal clips that can snag the cap.
3. Fold the cap in half lengthwise, pinch the open edge, and hold it at the front of your hairline.
4. Stretch the cap over your head, pulling it back over the bun. Work the front edge down first, then the sides.
5. Tuck any loose strands at the hairline and the back of the neck inside the cap with your fingers.
6. Run your palm over the surface to smooth out air pockets, then check that the edge sits evenly all the way around.

If you have very long or thick hair, a loose braid works better than a bun. Braid it from the crown down, then wrap the braid into a flat coil at the nape before you start stretching the cap.

Fitting the Cap for a Better Seal

A cap that fits well stays put, and one that is too loose lets water and hair slip out. Silicone caps generally hold a firmer seal than latex or lycra caps, which matters most when you swim laps or flip turns. Manufacturers typically size caps by head circumference, so check the size chart before you buy and compare it to your head measurement.

After you put the cap on, the edge should sit about an inch above your eyebrows and cover your ears. If the front lifts or the back pulls, take the cap off and reposition the bun, since a bulky bun pushes the cap out of shape.

Tips and Common Mistakes

• Do not pull the cap over dry, tangled hair. It snags and can tear the seam.
• Avoid large metal clips. They can puncture silicone and lift the cap at the edge.
• Stretch the cap gently from the edges, not the middle, to protect the material.
• Put the cap on before you get in the pool, not while standing in the water.
• Keep a spare cap on hand, since a single tear ends the session early.

For a full overview of cap options, see TYR Long Hair Silicone Swim Cap: How to Choose and Use One to Keep Hair Dry and Silicone Swim Cap for Long Hair: A Step-by-Step Guide to Keeping Hair Dry.

Recommended Gear

• Silicone swim cap for long hair: A silicone cap holds a firmer seal and resists tearing better than lightweight fabric. View on Amazon
• Wide-tooth comb: A wide-tooth comb removes tangles without breaking strands before the cap goes on. View on Amazon
• Flat bobby pins: Flat pins hold a low bun in place without bulging under the cap. View on Amazon

FAQ

Should my hair be wet or dry when I put on a swim cap?

Slightly damp hair is the best choice because it is easier to smooth and less likely to tangle. Fully dry hair tends to snag, and dripping wet hair makes the cap slide.

Can I put a swim cap on over a braid?

Yes, a flat braid coiled at the nape usually works well. Keep the braid as flat as possible so the cap does not lift at the back.

Will a swim cap keep all my hair dry?

A well-fitted cap keeps most hair dry, but a few strands near the edge often get wet. Tucking loose hair carefully improves the result.

Conclusion

To put a swim cap on long hair, detangle first, gather the hair into a low bun or flat braid, and stretch the cap evenly over the bundle. Check the fit at the hairline and tuck any stray strands before you enter the water. A little practice makes the process quick and keeps your hair drier session after session.

Related reading

• Women's Swim Cap for Long Hair: 6 Best Picks for Keeping Hair Dry (2026)

About the author