Keyhole Bandeau One Piece

30 Years Swimwear Expertise

Designed by women, for women

Responsible, timeless
designs

Keyhole Bandeau One Piece

$215

Size 8 10 12 14 16

ColourKhaki

As a sale item, this product is only eligible to return for an exchange or store credit

The ML Separates Keyhole Bandeau One Piece doubles as a bodysuit with multiple looks. The fine rouleau straps can be tied around the neck or at the front to create that classic bandeau shape.

Fits a B Cup up to a Full C Cup bust
Shelf Bra
Side bone support and gripper tape
Soft optional removable cups
Rouleau tie halter straps
High cut leg height and regular bottom coverage
Fully lined in our Recycled Body Sculpting silky touch lining

GRS Certified

Oeko-tex® Certified

Sculpt & Support

Technical Mastery

Learn More

True to size our model is wearing a size 10 one piece. She is 178cm, has an 90cm bust, 94cm hips, and a 69cm waist.

Please use the following as a guide to ensure the perfect fit.

Measurement chart for bust, underbust, waist, and hip sizes with cup sizing information.

To help you know where and how to measure, view our information on How To Measure and our Swim Style Guide.

Exclusive Main Fabric: 85% Recycled Nylon, 15% Elastane
Exclusive Lining: 85% Recycled Nylon, 15% Elastane

To ensure correct care, please refer to the individual instructions on each product. Rinse your swimwear after use. Cold gentle machine wash separately or hand wash with lukewarm water using mild detergent. Dry in shade.

We offer free delivery in Australia for all orders. For international orders outside of Australia, please see our shipping page for current rates.

Although we hope you love all your items from Monte & Lou, we have an easy online returns process if you are not 100% happy with your purchase.

As a sale item, this product is only eligible to return for an exchange or store credit

Need help with sizing, styling or a general question? We are here to help and we would love to hear from you.

Get in touch using the chat in the bottom right of your screen, or contact us.

Discover the Monte and Lou difference

Designed by women with decades of swimwear expertise and refined through continual fit testing, Monte and Lou swimwear is engineered to flatter, support and move with you.

Every detail is considered, from shaping and coverage to fabric choice and construction, so you can feel confident, comfortable and supported in and out of the water.

GRS Certified Recycled Nylon

Our Keyhole Bandeau One Piece is proudly GRS certified, giving you confidence that it is genuinely crafted from recycled fabrics. Every yarn can be traced back to verified sources such as plastic bottles, fishing nets, and reclaimed carpet fibres. No greenwashing, just a genuine commitment to creating quality swimwear that cares for the planet.

Oeko-tex® Certified

Our fabric mills employ state-of-the-art processes and printing methods, and our Keyhole Bandeau One Piece conforms to Oeko-tex® Standard 100. This is an independent certification system that ensures textiles are produced free from harmful chemicals.

The Secret Within

To truly appreciate the quality of our swimwear, you only need to look within. Our Keyhole Bandeau One Piece is fully lined with our bespoke lining, which is high in Elastane to sculpt and support. Seams are beautifully finished, usually enclosed, keeping overlocked edges out of sight.

Technical Mastery

With 30+ years of industry experience, this piece has been crafted with the utmost care and skill. The Keyhole Bandeau One Piece is fully lined with silky, body-sculpting fabric and plenty of elastane for superior support. Every seam and internal element is carefully encased for comfort. Beautiful inside and out.

Built on Decades of Swimwear Mastery

Monte & Lou was never about chasing trends. It was built on a simple truth learned through decades in the swimwear industry: great swimwear is engineered, not improvised.

Founded in 2018 by industry veterans Kay Howitt and Lynne Tramonte, Monte & Lou is shaped by years of designing and producing for household swimwear brands. This depth of experience informs every decision, from fabric selection and construction to fit, support, and longevity.

Every silhouette is refined through technical precision. Every detail is intentional. Luxurious, eco conscious fabrics are paired with expertly engineered cuts to deliver swimwear that flatters, supports, and feels exceptional on the body.

This is swimwear designed by authorities in the field. Crafted with confidence. Worn with confidence. Made to last, season after season.