The "Alexandra" Briefs – Invisible Bonding Innovation

Femme avec sous-vêtements sans couture noir confortable pour femme haut de gamme

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Marie-Louise is 5'9" and wears a size S

"Alexandra" Black Seamless Cotton Panties

Coton-Elasthanne

The "Alexandra" Panty – The Innovation of Invisible Bonding

$23.00 USD

Size XS S M L XL

ColorBlack

Fabric Coton-Elasthanne

Elegant and regal, the Alexandra deep black cotton seamless panties are an essential for your nightwear wardrobe. A chic shade that enhances the silhouette while ensuring complete invisibility under your darkest luxury homewear outfits.

The Invisible Bonding Revolution
The "Alexandra" seamless panties are not just underwear; they are a technological marvel. Thanks to high-precision bonding assembly, we have eliminated every thread and every edge. This technique allows for a perfect fusion of layers, creating briefs of absolute thinness that become one with your body.
The Luxury of Pima Fiber
Unlike classic invisible women's underwear, which is often synthetic, the Alexandra model prioritizes natural materials:
81% Pima Cotton: dubbed "the silk of cottons," Pima provides exceptional softness, breathability, and hypoallergenic properties.
19% Elastane: a precise dosage to guarantee shape retention and impeccable hold throughout the night.
Zero Edge, Zero Seam: the bonded assembly eliminates any bulk, making the cotton seamless briefs completely undetectable, even under the soft Leandra pyjama pants.

81% Pima cotton 19% elastane
Our cut philosophy: Relaxed grading
At Sunday Sleep Club, nightwear is an architecture dedicated to well-being. Our sets have been developed with intentionally generous and oversized patterns to accompany your movements with complete fluidity, without ever restricting the body.
• For a fluid and relaxed fit (Signature Style): Choose your usual size.
• For a more fitted or body-hugging look: We invite you to select one size smaller than your usual size.
For lingerie essentials, I enlisted the expertise of a French house renowned for its 150 years of savoir-faire.
Boxer shorts, bralette, and tank top in the highest quality Pima cotton, with a slight addition of elastane for perfect comfort. Seamless. Laser-cut edges.
For the bralette, the bust shape was molded into the fabric to avoid compression, providing absolute comfort.
This line was designed to be your sleep ally.

Size guide

We carefully prepare and ship your orders to ensure a fast and reliable experience. If an item does not suit you, you can return it easily according to our return conditions.

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OUR COMMITMENT

THE PROMISE
SUNDAY SLEEP CLUB.

FINE MATERIALS

Mulberry silk, certified organic cotton or premium satin: we only select high-quality materials for absolute comfort, night after night.

RESPONSIBLE MANUFACTURING

European workshops with fair conditions. Zero overproduction — every piece is made just right.

TIMELESS DESIGN

Clean cuts designed to last. Luxury in simplicity — fewer pieces, but the right ones.

DISCOVER OUR COLLECTIONS

SLEEP AS YOU ARE

Because every individual has their own way of resting, we design nighttime essentials that respect your style, your body, and your rhythm.

YOUR QUESTIONS

How to choose my pajamas

Consult our size guide and material guide to find the perfect sleepsuit for your child's sleep habits.

What sizes are available?

Our collections range from XS to XL. We manually grade our sizes on a wide variety of body types.

What is the composition of my coins?

GOTS mulberry silk, organic pima cotton, organic washed linen. The exact composition is detailed on each product page.

How to care for silk?

Delicate wash at 30° or hand wash. Dry flat. Iron at low temperature inside out.