Seamless Period Swimwear Bottoms | 4-Layer Leak-Proof Bikini Menstrual Panties | OEM/ODM Wholesale

Revolutionary Design Concept: The Menstrual Swimsuit

Say goodbye to the limitations of the physiological period. Our seamless menstrual bikini swimming trunks are engineered to provide maximum security and discretion in the water.
The design completely eliminates the need for bulky sanitary napkins, tampons, or menstrual cups. The ultra-thin, seamless edges lay flat against the skin like a second layer, ensuring no visible panty lines and no awkward swelling when submerged in water.

Our innovative design concept ensures you never have to worry about your physiological period while at the beach or pool. Look good, swim confidently.

Advanced 4-Layer Leak-Proof Engineering

What makes this swimwear truly leak-proof? It is all in the core architecture. Unlike standard daily period panties, our swimwear features a specialized built-in gusset designed for aquatic environments:

• Layer 1 (Inner): Fast-wicking layer that pulls fluid away from the body instantly.

• Layer 2 (Absorbent): A high-density, thin core that traps menstrual fluid securely without absorbing pool water.

• Layer 3 (Waterproof Barrier): An extended TPU layer. The wrapping design at both the front and back is extensively widened to make it 100% leak-proof, preventing any blood from escaping into the water.

• Layer 4 (Outer Shell): High-stretch, chlorine-resistant, and UV-resistant swimwear fabric.​

The four-layer extended wrapping design in the front and back provides superior safety. It perfectly combines the function of ordinary underwear and sanitary napkins.

OEM & ODM Customization for Your Brand

As a specialized functional apparel manufacturer, Shenzhen Ljvogues provides a one-stop OEM/ODM service to help you build your period swimwear line.​

• Fabric & Print Customization: Customize the outer shell with your unique floral prints (like the blue petal design shown), solid colors, or ribbed textures.

• Brand Identity: Add your logo via premium heat-transfer printing, and customize the hygienic liners, wash labels, and eco-friendly packaging.

• Strict Quality Control: Every batch undergoes rigorous hydrostatic testing to ensure zero leaks.

Our comprehensive size table (S-2XL) covers waist, hip, center height, and leg opening measurements to ensure a perfect, secure fit for all body types.

Frequently Asked Questions (B2B Sourcing)

Q1: Will the absorbent gusset swell up when submerged in the pool?
No. The core is engineered with specialized high-density microfibers and protected by a waterproof TPU barrier. It is designed to absorb and lock in menstrual fluid from the inside while repelling pool water from the outside, keeping the swimsuit discreet and flat.​

Q2: What is the minimum order quantity (MOQ) for custom prints?
While you can purchase our in-stock blank/standard print designs starting from just 1 piece (at $3.42/pc), full custom OEM printing and branding typically require an MOQ of 500-1000 pieces per design to ensure the most cost-effective production.

Q3: Can these be worn as everyday period underwear?
While they are optimized for swimming with chlorine-resistant and quick-dry outer fabrics, the seamless, highly secure 4-layer design makes them extremely comfortable and safe for daily wear, sports, or workouts.​

Q4: How accurate is your sizing?
Our sizing is strictly graded with a tolerance of just 1-2 cm. Because swimwear requires a snug fit to prevent water flushing through the leg openings, our pattern makers have optimized the tension of the leg elastics specifically for aquatic use.