Siena Front Knot Monokini One Piece - Metallic Festival of Rainbows
- In stock, ready to ship
- Backordered, shipping soon
Serve major poolside energy in the Siena Front Knot Monokini, a one-piece that gives all the right curves and color. This flirty silhouette features a plunging neckline, central knot detail, and dramatic cutouts that create the illusion of a two-piece while offering the security of a one-piece. Finished in our Metallic Festival of Rainbows print, this suit was made to shimmer under the sun, on the ‘Gram, or at your next yacht party.
Model Sizing:
Anna wears a size small
Height: 5'5" Bust: 35" Waist: 25.5" Hips: 39"
Shop the Festival of Rainbows Print Here
Find out how to get this suit for 15% off
Radiate pure beach joy in our Metallic Festival of Rainbows print — a shimmer-soaked spectrum inspired by sun-faded surf towels, seaside festivals, and salty sunsets. This metallic rainbow swimwear fabric sparkles under the sun with every move.
Designed for carefree days, dancing tides, and golden hour glows, it’s made for the modern mermaid chasing color, freedom, and forever summer.
Sustainably made in small batches with recycled materials, this eco-friendly swimwear is available for both him and her. Each piece is handcrafted for premium quality.
- Style: One-piece monokini with front cutout and knot tie bust
- Coverage: Semi-cheeky rear with moderate front coverage
- Size: Available in S (2–4), M (6–8), L (10–12)
- Fit: Curve-contouring with a high-leg silhouette and scoop back
- Print: Metallic Festival of Rainbows – shimmer-infused rainbow gradient
- Color: Multicolor metallic with vibrant pink, yellow, blue, and green
- Lining: Fully lined for comfort and opacity
- Sizing: Runs true to size
- Details: Front knot, peek-a-boo cutout, high-leg rise
- Fabric: 64% Ecoyarn, 16% Metallic, 12% Polyamide, 8% Elastane - All our fabric is constructed from regenerated and recycled materials
- Finish: Smooth-touch shimmer fabric with luxe elasticity
- Protection: Fade-resistant and quick-drying
- Hardware: None – minimal and movement-friendly
- Craftsmanship: Reinforced seams, double-lined for structure
- Design: Created for confident, curve-loving, beach-to-festival styling
- Sustainability: Produced in small batches in ethically run facilities using responsible production practices
Our Salty Mermaid suits are made to keep you feeling confident, comfortable, and totally unstoppable. Because every style has its own unique fit, we recommend checking your bust measurement and using our Size Guide to find your perfect match.
Merbabe tip: With so many styles and shapes to choose from, the best way to discover your ideal fit is by checking your full body measurements. That way, you’ll know your Salty Mermaid suit will hug you in all the right places.
SALTY MERMAID SWIM WEAR FIT GUIDE
SWIMWEAR | X-SMALL | SMALL | MEDIUM | LARGE | X-LARGE |
US/CANADA | 0-2 | 2-4 | 4-6 | 6-8 | 8-10 |
SHELL | AA-A | A-B | B-C | C-D | D-DD |
BOTTOM'S | 00-2 | 2-4 | 4-6 | 6-8 | 8-10 |
COVER-UP'S
EMBOSSED SKIRTS SIZE | SMALL | MEDIUM | LARGE |
WAIST | 14"-15.5" | 15"-17" | 16"-18" |
HIPS | 16.5"-18" | 17.5"-19" | 18.5"-20" |
LENGTH | 11” | 11.5” | 12.25" |
KAFTAN |
ONE SIZE |
WIDE LEG PANTS
SIZE | S/M | M/L |
WAIST | 13.25"-15" | 15.25"-18" |
HIPS | 24" | 24" |
INSEAM | 30" | 30" |
MEN’S WEAR
MEN’S SWIM TRUNKS | SMALL | MEDIUM | LARGE | X-LARGE | 2X-LARGE |
WAIST | 29-30" | 31-33" | 33-35" | 36-38" | 40-42" |
INSEAM | 4" | 4" | 4.75" | 4.75" | 5" |
LEG OPENING | 23" | 24" | 25" | 26" | 28" |
MEN'S BUTTON-DOWN SHIRT SIZES
MEN’S BUTTON DOWNS | SMALL | MEDIUM | LARGE | X-LARGE | 2X-LARGE |
CHEST | 19" | 20.5" | 22" | 23.5" | 25" |
NECK | 16.5" | 17.25" | 18" | 18.75" | 19.5" |
LENGTH | 27.5" | 28" | 29.5" | 29.5" | 30" |
CHEEKY CUT / FULL COVERAGE
Our Cheeky/Full-coverage swim bottoms prioritize comfort and modesty, offering the most fabric across the back and often sitting lower on the hips or at the natural waist. They provide a secure, stay-in-place fit that’s great for active beach days or simply feeling more covered. The shape smooths and supports the hips and rear while still giving a flattering, body-conscious silhouette. This classic cut is a timeless choice for those who want confident coverage without sacrificing style.
SEMI CHEEKY / MODERATE COVERAGE
Our Semi-Cheeky swim bottom strikes a balance between modest and daring, offering moderate back coverage that reveals just enough.
SEMI BRAZILIAN
Our Semi-Brazilian swim bottom offers a happy medium between Brazilian and Semi-Cheeky.
BRAZILIAN BOTTOM / MINIMAL
Our Brazilian swim bottom is known for its minimal rear coverage.
MEN’S TRUNKS
For the perfect merman. Designed for comfort, these shorts feature a mesh liner, an elastic waistband with 4-way stretch and a drawstring for secure closure.
MEN’S BUTTON-DOWN SHIRT
With a crisp collar, short sleeves, and front pocket, this shirt is perfect for beach days that turn into beach nights.
HOW TO MEASURE
- Bust – Wrap the tape around the fullest part of your chest (no bra needed, merbabe).
- Waist – Find the narrowest point of your natural waistline.
- High Hip – Measure at the top of your hip bone, just below the waist.
- Bottom – Measure around the fullest part of your hips and booty.
MERBABE TIPS
Keep your measuring tape level and parallel to the floor. Stand tall with feet together and stay relaxed—no sucking in! Double-check your numbers to get the most accurate fit so your suit hugs you in all the right places.


Returns & Exchanges: Regularly priced items may be returned within 30 days for a refund or exchange. Marked down items are Final Sale.
Shipping & Delivery: Orders will be shipped within 2 business days, Monday through Friday. Shipping times depend on method selected at checkout.
Wash: After each dip in the water, hand wash separately from your seashells.
Dry: Lay flat. Do not wring or attempt to fan dry with your mermaid tail.
Avoid: Keep away from the Sun and Lobsters.
Store: Do not store wet or next to your pet dolphin.
{formbuilder:2464}