How to Wear the Puma X Modibodi Seamfree Active Bikini

How to Wear the Puma X Modibodi Seamfree Active Bikini

By The Original Period & Leak Proof Underwear | Modibodi US | Published: 2026-11-06

Category: How-to Guides

A practical guide to wearing the Puma X Modibodi Seamfree Active Bikini Moderate for workouts: how to size it, layer it under activewear, and care for the bonded seams.

Start with the right size and colour

The Puma X Modibodi Seamfree Active Bikini Moderate is designed to sit on your hips with a true bikini cut and moderate bottom coverage. Because the fit is meant to stay put during movement, choose your usual US size from the available range rather than sizing up for extra room. The fabric is soft and stretchy with excellent shape retention, so it should move with you without feeling loose.

Colour matters for workouts: the black-coloured lining is there to stop unwanted stains, but lighter outer colours like Mist Pink may show through thin or light-coloured activewear. If you wear pale leggings or shorts, Onyx Grey or Native Blue are the safer choices. The Mist Pink option is available in US 6/S through US 14/2XL, while Native Blue and Onyx Grey cover a narrower size range, so check availability in your size before you decide.

Putting it on for a workout

The bonded seams are what make this bikini invisible under activewear, but they also mean you should handle the underwear with a little care when dressing.

  1. Step 1: Check the fit before you add layers: Put the bikini on first and make sure the waistband sits flat on your hips and the leg openings aren't digging in. The moderate bottom coverage should feel secure, not tight.
  2. Step 2: Position the absorbent panel: The black-coloured lining is the absorbent area. Adjust it so it sits comfortably against your body before you pull on leggings or shorts.
  3. Step 3: Add your activewear: Because the seams are bonded, there are no visible panty lines under tight activewear. Pull on your leggings or shorts as usual and check that the bikini hasn't rolled or bunched.
  4. Step 4: Move and test: Do a quick stretch, squat, or jog in place. If the bikini stays in place and you can't see lines, you're set. If it shifts, the size may be too big or the cut may not suit your body shape.

What moderate absorbency means for workouts

This bikini holds up to 30 mls, which Modibodi equates to up to 6 tampons (based on a 5 ml tampon). That's a moderate level of protection, and the product is listed as perfect for heavy days. For a workout, that means it can handle a heavier flow day without you needing to change immediately, but it isn't designed as a full-day or overnight solution for very heavy flow.

If your flow is lighter on workout days, a lower absorbency style may feel less bulky. If you need more protection for longer sessions, consider a higher absorbency option or change after your workout.

Product facts that affect how you wear it

Caring for the bonded seams and absorbent lining

The care instructions for this bikini are specific because of the bonded seams and absorbent materials. Machine cold wash after wearing. Do not bleach, do not add softener, do not tumble dry, and do not iron. Line dry instead. Following these steps protects the stretch, the shape retention, and the leak-proof performance.

The merino wool in the lining naturally controls odour and wicks away moisture, but it needs to be washed after each wear to stay fresh. Avoid washing with towels or items that have zips or hooks, as these can snag the bonded seams.

When this bikini is the right choice—and when it isn't

  • Good for: gym sessions, yoga, running, and cycling on moderate to heavy flow days: The seamfree design and secure bikini cut suit movement, and the moderate absorbency handles up to 6 tampons' worth of flow.
  • Good for: wearing under tight leggings or shorts: Bonded seams eliminate visible panty lines, so you can wear it under form-fitting activewear without showing the underwear.
  • Not ideal for: very heavy flow or long events without a change: Moderate absorbency has limits. If you need all-day protection on a heavy day, consider a higher absorbency style or plan to change.
  • Not ideal for: those who prefer a higher waist or more bottom coverage: This is a true bikini cut with moderate bottom coverage. If you prefer more coverage, a full brief or high-waist style may suit you better.

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