Cosmo 4-Piece Set
The bikini everyone keeps asking about. The bundle includes our TOP, BOTTOM, MICRO-SHORT, AND HEADBAND.
Buy the full set for only €110 (retail value €130) SAVE €29 because the whole is better than the parts.
The Cosmo set in Burgundy, white and blue stripes
Includes:
- Cosmo Bottom
- Cosmo Top
- Cosmo Micro-shorts
- Cosmo Headband
- Material: 82% polyester, 18% elastane
The Cosmo set in Burgundy, white and blue stripes
Includes:
- Cosmo Bottom
- Cosmo Top
- Cosmo Micro-shorts
- Cosmo Headband
- Material: 82% polyester, 18% elastane
Hand wash with cold water and mild stain remover when needed. If using a washing machine, select a gentle or delicate cycle with cold water. Do not spin dry. Lay flat in a horizontal position to air dry.
Hand wash with cold water and mild stain remover when needed. If using a washing machine, select a gentle or delicate cycle with cold water. Do not spin dry. Lay flat in a horizontal position to air dry.
SHIPPING
Click here to read our full shipping policy
Orders processed in 2–3 business days by our warehouse, based in Holland (Europe); delivery depends on carrier. Costs shown at checkout.
International orders may incur customs duties or import taxes, which are the responsibility of the recipient.
Uncollected packages may be reshipped at your cost or refunded minus return fees.
.
RETURNS
Click here to read our full return policy
You have 14 days from delivery to return items. Items must be unused and in original packaging. Return shipping costs are your responsibility; original shipping is non-refundable.
To request a return, please register your return here and follow the steps in our return process.
Questions: Contact us anytime for help.
SHIPPING
Click here to read our full shipping policy
Orders processed in 2–3 business days by our warehouse, based in Holland (Europe); delivery depends on carrier. Costs shown at checkout.
International orders may incur customs duties or import taxes, which are the responsibility of the recipient.
Uncollected packages may be reshipped at your cost or refunded minus return fees.
.
RETURNS
Click here to read our full return policy
You have 14 days from delivery to return items. Items must be unused and in original packaging. Return shipping costs are your responsibility; original shipping is non-refundable.
To request a return, please register your return here and follow the steps in our return process.
Questions: Contact us anytime for help.
Cosmo 4-Piece Set
The Cosmo set in Burgundy, white and blue stripes
Includes:
- Cosmo Bottom
- Cosmo Top
- Cosmo Micro-shorts
- Cosmo Headband
- Material: 82% polyester, 18% elastane
The Cosmo set in Burgundy, white and blue stripes
Includes:
- Cosmo Bottom
- Cosmo Top
- Cosmo Micro-shorts
- Cosmo Headband
- Material: 82% polyester, 18% elastane
Hand wash with cold water and mild stain remover when needed. If using a washing machine, select a gentle or delicate cycle with cold water. Do not spin dry. Lay flat in a horizontal position to air dry.
Hand wash with cold water and mild stain remover when needed. If using a washing machine, select a gentle or delicate cycle with cold water. Do not spin dry. Lay flat in a horizontal position to air dry.
SHIPPING
Click here to read our full shipping policy
Orders processed in 2–3 business days by our warehouse, based in Holland (Europe); delivery depends on carrier. Costs shown at checkout.
International orders may incur customs duties or import taxes, which are the responsibility of the recipient.
Uncollected packages may be reshipped at your cost or refunded minus return fees.
.
RETURNS
Click here to read our full return policy
You have 14 days from delivery to return items. Items must be unused and in original packaging. Return shipping costs are your responsibility; original shipping is non-refundable.
To request a return, please register your return here and follow the steps in our return process.
Questions: Contact us anytime for help.
SHIPPING
Click here to read our full shipping policy
Orders processed in 2–3 business days by our warehouse, based in Holland (Europe); delivery depends on carrier. Costs shown at checkout.
International orders may incur customs duties or import taxes, which are the responsibility of the recipient.
Uncollected packages may be reshipped at your cost or refunded minus return fees.
.
RETURNS
Click here to read our full return policy
You have 14 days from delivery to return items. Items must be unused and in original packaging. Return shipping costs are your responsibility; original shipping is non-refundable.
To request a return, please register your return here and follow the steps in our return process.
Questions: Contact us anytime for help.
- Adjustable ties at the neck and back, tie it looser, tighter, higher. Get the fit exactly how you want it. No gaping, no digging in.
- Soft, thick fabric that feels light against the skin. Substantial enough to hold you in, soft enough that you forget you're wearing it.
- Double lined, no transparency, removable padding. Fully lined so you're covered wet or dry. Keep the padding in or take it out, your call.
BEFORE YOU ADD TO CART
Everything you're wondering about
No. Every piece is double lined, so you're covered whether it's wet or dry. The padding is removable: keep it in or take it out, whatever you prefer.
Adjust the ties gently for a secure, comfortable fit that feels right for you.
The fabric feels smooth, soft and supportive against the skin.
Yes! Select the size combination that works best for your fit.
True to size. Take your usual size and fine-tune with the ties. The micro-short sits high on the waist, size up if you prefer it looser. Full measurements are in the size guide above.
You save 21% (€29) with the full set. It includes the bikini top, bottom, microshort, and headband for €110, instead of €139 if bought separately.
On our model
She's 178 cm, usually a size S, and wears Top S · Bottom S · Short S
Measurements in cm
Sizing notes
- True to size: Choose your usual size for the intended fit.
- Mix your sizes: You can select different sizes for the top and bottom.
- Fit notes: Check the product details for piece-specific fit guidance.
- Still unsure? DM us on Instagram @mosj_atelier and we’ll help.
FAVOURITES ON ROTATION
Shop the cosmo set
