$199.95 AUD
Colour: BLACK

Our sizes are Australian. Check your international conversion here.

Read our advice about finding your size in one pieces here.

Get fitted with us for free from anywhere! Learn more here.

Pickup available at Byron Warehouse

Usually ready in 24 hours

Meet Sienna: Sleek, understated, minimalist one piece.

Sporting a plunging neckline and clean lines, Sienna is high-cut to elongate the legs and the ruching feature across the front panel offers a gentle detail. Sienna styles beautifully as body suit: just add slides and skirt or pants.

With an adjustable back hook, Sienna allows you to fit both your bottom half and top half beautifully. 

Watch the Sienna One Piece fit video here sizing and style advice.

  • Underwired for support
  • New adjustable straps - slider mechanism
  • Adjustable back
  • High-cut leg
  • Medium coverage bottom
  • Fully lined (power mesh)
  • No padding

If you are the same size on the bottom half as you are on the top half (i.e. 14DD top, 14 bottom) then simply order your bra size. If you are larger on the bottom half than you are on the top (i.e. 8G top, 10 bottom) then please complete our e-fitting form to ensure you select the right size.


Fabric Outer - 78% Recycled Nylon & 22% Xtra Life Lycra ®

Fabric Inner - 75% Nylon & 25% Spandex

Always rinse immediately after swimming in cold fresh water & take care to completely dry any gold accessories to prevent tarnishing

Hand-wash only - to help protect the longevity of your garment, do not machine wash. The use of underwires means that some machines may damage the garment.

Lay flat to dry in the shade and out of direct sunlight.

Don't wear your swimwear on abrasive surfaces and this may cause damage to the fabric.


Miccy wears a size 12G bra and is wearing a size 16F Sienna One piece. 

Peta wears a size 8G bra and is wearing a size 10F Sienna One piece. 

Melita wears a size 8G bra and is wearing a size 8G Sienna One piece.


Please take a moment to familiarise yourself with our policies before purchasing:

Shipping Rates & Information

Returns Policy

Adjustable back to fine-tune your fit

Hidden underwire bra structure for lift, shape, and support

High-cut legs for elongating effect

The timeless one-piece that actually fits your bust.