30-DAY RETURNS
Changed your mind? You may request a return within 30 days of receiving your order. Items must meet our return conditions. Please see our Refund & Return Policy for full details.
Meet Sienna, a sculpting halter-neck jumpsuit designed to flatter your shape while giving you the freedom to move effortlessly.
The halter neckline creates a sleek, feminine upper silhouette, while the close-fitting bodycon construction gently contours the waist, hips and legs. A curve-enhancing, butt-lifting design adds definition through the back before flowing into an elegant flared leg for a balanced, elongated look.
Made from soft, stretchy fabric, Sienna moves comfortably with your body whether you're training, heading to a Pilates class or styling it for an effortless off-duty look. Pair with trainers for an elevated activewear aesthetic or add an oversized jacket for everyday wear.
Details & Fit
Halter neckline
Sculpting bodycon fit
Curve-enhancing construction
Butt-lifting design
Flattering high-waist effect
Flared-leg silhouette
Soft, stretchy fabric
Flexible and comfortable fit
Designed for fitness and everyday styling
Crafted from carefully selected materials for a comfortable and flattering fit.
This item fits true to size unless stated otherwise in the product description. If you are between sizes or prefer a more relaxed fit, we recommend choosing the larger size.
Please refer to our size chart before ordering.
Fabric color may appear slightly different due to lighting, screen settings and variations between devices.
We aim to process and dispatch all orders within 1–2 business days, Monday to Friday.
Delivery: Once your order has been dispatched, delivery usually takes 6–8 business days.
Total estimated shipping time: 7–10 business days.
Tracking information will be provided once your order has been shipped.
You may request a return within 30 days of receiving your order. Exchanges for a different size or colour of the same item are available subject to availability. Return conditions apply. Please see our Refund & Return Policy for full details here.
30-DAY RETURNS
Changed your mind? You may request a return within 30 days of receiving your order. Items must meet our return conditions. Please see our Refund & Return Policy for full details.
Got Questions? We’ve Got Answers!
Everything you need to know about shipping, returns, and more.
Our dresses are designed for a figure-enhancing fit, but sizing may vary slightly depending on the fabric and style. To ensure the perfect fit, please refer to our Size Guide on each product page.
If you're between sizes, consider:
Still unsure? Our customer support team is happy to help you find the ideal size!
We offer free shipping on all orders, with no minimum purchase required.
At Sixteen Layers, we aim to process and deliver every order as quickly and smoothly as possible.
Orders placed before 11:59 PM (CET/CEST) are processed within 1–2 business days. Orders placed after this time will be processed on the next business day.
Once your order has been processed and shipped, delivery usually takes 6–8 business days. The total estimated shipping time is 7–10 business days.
To maintain the quality and longevity of your dress, follow these care instructions:
Washing: Hand wash in cold water with mild detergent. If machine washing, use a delicate cycle inside a laundry bag.
Drying: Do not wring. Lay flat to air dry in the shade to prevent fabric distortion.
Ironing: If needed, steam or use a low-heat setting on the reverse side. Fabrics like satin, chiffon, and silk are delicate and can be damaged by excessive heat.
Storage: Hang on a padded hanger or fold in a garment bag to avoid creases.
By following these steps, your dress will stay flawless for every occasion!
Yes. You may request a return within 30 days of receiving your order. Items must be unused, unworn and meet our return conditions. Exchanges are available for a different size or colour, subject to availability.
Please see our Refund & Return Policy for full details.
Our dresses are made from premium fabrics with designs that provide a flattering fit. Most styles are lined for added coverage, while certain fabrics such as chiffon or lace may include intentional sheer details as part of the design.
For figure-hugging or lighter fabric dresses, we recommend seamless nude undergarments or shapewear for a smooth finish.
Lining and fabric opacity vary by style. Where relevant, this information may be included on the product page. If you need additional details about a specific item, our support team is happy to assist.