Woman wearing a black long-sleeve thermal swimshirt on a beach

Woman wearing a black thermal swimsuit on a beach with trees in the background

Woman in black long-sleeve thermal swimshirt top and black thermal swim leggings

Woman in black thermal rashshirt outfit stretching outdoors with a clear blue sky.

Woman in black thermal swimwear standing on a beach with trees in the background

Person wearing a black thermal rashshirt with white accents on a beach

Woman in athletic swimwear and black thermal leggings standing on a beach with trees in the background

Black thermal rashshirt with white piping and 'Kona' branding on a blurred beach background

Three women in black thermal swimsuits walking on a beach.

Lady wearing a black thermal rash shirt and black thermal swim leggings on the beach

Person wearing a black long-sleeve thermal longsleeve rash shirt

Woman wearing a black thermal long-sleeve rash shirt and black thermal leggings on a white background

Woman wearing a black thermal swim long-sleeve top and leggings on a white background

Woman wearing a black thermal long sleeve rash shirt on a white background

Person wearing a black long-sleeve thermal rash shirt top with white trim on a white background

Black long-sleeve thermal rash shirt with white accents on a white background

Black long-sleeve thermal rash shirt with white trim

Person wearing a black thermal long-sleeve rash top and leggings on a white background

Person wearing a black long-sleeve thermal rash shirt with visible branding on a white background

Woman wearing a black thermal long sleeve rash shirt and black thermal leggings

Person wearing a black long-sleeve thermal rash shirt top with white accents on a white background

Close-up of a person wearing a black thermal long sleeve

Woman wearing a black long-sleeve thermal swim top and leggings on a white background

Woman wearing a black long sleeve rash shirt with white accents on a white background

Two people in black thermal swimsuits walking on a beach with ocean and sky in the background.

Three women wearing black thermal swimsuits with size chart information on a white background

ONYX BLACK THERMAL FITTED RASHIE

Name: ONYX BLACK THERMAL FITTED RASHIE
Brand: koziiswim
SKU: 770830461007
Price: 129.0 AUD
Availability: InStock
Rating: 5.0 (6 reviews)

$129.00

6 reviews

By koziiswim

Size

Our swimwear is designed to be quite firm fitting compared to "fashion" swimwear so our sizing may feel a bit smaller than you are used to. We do suggest sizing up a size from your 'normal' size when wearing Kozii One pieces if you are in between sizes.

Female Size Guide

AUS SIZE	US SIZE	CHEST	HIPS	TORSO
Girls 6	/	58–62cm \| 22–24 in	58–63cm \| 22–24 in	42–45cm \| 16–17 in
Girls 8	/	62–67cm \| 24–26 in	63–68cm \| 24–26 in	45–49cm \| 17–19 in
Girls 10	/	67–71cm \| 26–28 in	68–73cm \| 26–28 in	49–53cm \| 19–20 in
Girls 12	26	71–73cm \| 28–28.7 in	73–78cm \| 28–30 in	53–56cm \| 20–22 in
Girls 14/Ladies 6	28	73–75cm \| 28–29 in	78–83cm \| 30–32 in	56–60cm \| 22–23 in
Ladies 8	30	80–85cm \| 31–33 in	83–88cm \| 32–34 in	60–65cm \| 23–25 in
Ladies 10	32	85–90cm \| 33–35 in	88–93cm \| 34–36 in	65–70cm \| 25–26 in
Ladies 12	34	90–95cm \| 35–37 in	93–98cm \| 36–38 in	70–75cm \| 27–29 in
Ladies 14	36	95–100cm \| 37–39 in	98–103cm \| 38–40 in	75–80cm \| 29–30 in
Ladies 16	38	100–105cm \| 39–41 in	103–108cm \| 40–42 in	80–85cm \| 31–33 in
Ladies 18	40	105–110cm \| 41–43 in	108–113cm \| 42–44 in	85–90cm \| 33–35 in
Ladies 20	42	110–115cm \| 43–45 in	113–118cm \| 44–46 in	90–95cm \| 35–37 in
Ladies 22	44	115–120cm \| 45–47 in	118–123cm \| 46–47 in	95–100cm \| 37–39 in
Ladies 24	46	120–125cm \| 47–49 in	123–128cm \| 48–53 in	100–105cm \| 39–41 in

100% CHLORINE TOUGH (CT) FABRIC — Due to the limited amount of stretch in this fabric, if you fall between sizes, we suggest selecting the larger size. Sizing up in all CHLORINE TOUGH (CT) one pieces is recommended.

Male Size Guide

SIZE	RACER	JAMMER	HIPS	WAIST
Boys 6	6	6	55cm	22"
Boys 8	8	8	60cm	24"
Boys 10	10	10	65cm	26"
Boys 12	12	12	70cm	28"
Boys 14	14	14	75cm	30"
Boys 16/Mens 14	XS	— (Racer only)	80cm	31"
Mens 16	S	XS/S	85cm	32"
Mens 18	M	S/M	90cm	34"
Mens 20	L	M/L	100cm	36"
Mens 22	XL	L/XL	105cm	38"
Mens 24	XXL	XL/XXL	110cm	40"

100% CHLORINE TOUGH (CT) FABRIC — Due to the limited amount of stretch in this fabric, if you fall between sizes, we suggest selecting the larger size. Sizing up in all CHLORINE TOUGH (CT) one pieces is recommended.

Active swimwear garments need to be a perfect fit in order for the wearer to gain the most out of their swimwear.

The "perfect fit" is a very individual thing as everyone has different body shapes and sizes and different requirements as to how they like to wear their swimwear. Some like to wear their swimwear 'really tight' while others like to go for more comfort.

In our girls and women's swimwear please read the product and fabric description for the styles as not all styles will suit all body shapes and sizes.

We tend to use all our styles on a regular basis so if you find a style you like then you can always look for garments in this same style to purchase when we release them out in the different printed fabrics.

Sizing can vary considerably for one pieces, if you are long in the body i.e. from neck to crutch then you will need a larger size to accommodate for the length of your body.

PLEASE NOTE: THE BELOW IS A GUIDE ONLY WHICH IS BASED ON OUR SWIMWEAR. MEASUREMENTS/SIZING WILL VARY SLIGHTLY WITH DIFFERENT FABRICS AND STYLES.

Fit reference: Charlie Ladies 8, Lily Ladies 10, Kristy Ladies 12, Kalani Ladies 8

Quantity

Warmth meets performance.
Our Onyx Thermal Fitted Rashies are 100% Australian made. They have been designed to keep you warm and comfortable in the water during winter training and racing and are also suitable for everyday wear and activities.

✔ The Italian brush performance fabric has a soft hydro-fleece interior for warmth and comfort

✔ Embroidered Kozii logo ✔ Comfortable stretch for unrestricted movement ✔ Durable, breathable, and anti-bacterial ✔ Designed and made at our Kozii Factory located in Tweed Heads South, NSW, Australia

More details

Long sleeve thermal rashie for winter training and racing
Fitted style for unrestricted movement
Simple Kozii embroidered logo
Italian Thermal fabric inner for warmth and breathability
High resistance to pilling and abrasion
Bacteriostatic treatment that supports natural sweat evaporation
Soft and comfortable against the skin
Pilling resistant
Designed and made in Australia

Kozii swimwear is proudly designed and made in Australia, blending high-performance fabrics with style and durability. Trusted by competitive swimmers and Diving Australia athletes, every piece is tested for comfort, support, and longevity. Our sustainable approach, including recycled fabrics, ensures your swimwear performs in training, competition, and everyday pool or beach sessions.

Model Sizes:

Bronte wears Ladies 8 Height: 175cm | Hips: 76cm | Chest: 89cm |Torso: 72cm | Waist: 69cm
Courtney wears Ladies 16 | Height: 180cm | Chest: 92cm | Torso: 80cm | Waist: 84cm | Hips: 114cm
Lily wearing a Ladies 10 | Height: 172 cm | Waist: 80 cm | Chest: 94 cm | Hips: 94 cm | Torso: 67 cm

Girls 14 recommended for taller juniors needing extra arm and torso length. Please refer to our Size Guide for the best fit. If you’re between sizes or prefer a more secure feel, consider sizing up.

Italian Bi-elastic high-performance fabric for comfort and durability and warmth
85% Nylon, 15% Lycra
Breathable and temperature regulating
Extremely durable construction
High resistance to pilling and abrasion
Anti - bacterial treatment
Flat locked seams for extra strength and a firm fit

Machine wash cold with like colours
Do not bleach

AUS SIZE	US SIZE	CHEST	HIPS	TORSO
Girls 6	/	58–62cm \| 22–24 in	58–63cm \| 22–24 in	42–45cm \| 16–17 in
Girls 8	/	62–67cm \| 24–26 in	63–68cm \| 24–26 in	45–49cm \| 17–19 in
Girls 10	/	67–71cm \| 26–28 in	68–73cm \| 26–28 in	49–53cm \| 19–20 in
Girls 12	26	71–73cm \| 28–28.7 in	73–78cm \| 28–30 in	53–56cm \| 20–22 in
Girls 14/Ladies 6	28	73–75cm \| 28–29 in	78–83cm \| 30–32 in	56–60cm \| 22–23 in
Ladies 8	30	80–85cm \| 31–33 in	83–88cm \| 32–34 in	60–65cm \| 23–25 in
Ladies 10	32	85–90cm \| 33–35 in	88–93cm \| 34–36 in	65–70cm \| 25–26 in
Ladies 12	34	90–95cm \| 35–37 in	93–98cm \| 36–38 in	70–75cm \| 27–29 in
Ladies 14	36	95–100cm \| 37–39 in	98–103cm \| 38–40 in	75–80cm \| 29–30 in
Ladies 16	38	100–105cm \| 39–41 in	103–108cm \| 40–42 in	80–85cm \| 31–33 in
Ladies 18	40	105–110cm \| 41–43 in	108–113cm \| 42–44 in	85–90cm \| 33–35 in
Ladies 20	42	110–115cm \| 43–45 in	113–118cm \| 44–46 in	90–95cm \| 35–37 in
Ladies 22	44	115–120cm \| 45–47 in	118–123cm \| 46–47 in	95–100cm \| 37–39 in
Ladies 24	46	120–125cm \| 47–49 in	123–128cm \| 48–53 in	100–105cm \| 39–41 in

ONYX BLACK THERMAL FITTED RASHIE

Female Size Guide

Male Size Guide

Customer Reviews

Recently Viewed

100% Australian Made

RECYCLED FABRICS

Afterpay

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INFORMATION

CUSTOMER CARE

We acknowledge and pay respects to the Bundjalung people, the traditional custodians of the land on which we now operate at Tweed Heads and recognise their continuing connection to land, waters, and culture. We pay our respects to the first Australians and their elders past, present and emerging.

Currency

ONYX BLACK THERMAL FITTED RASHIE

Female Size Guide

Male Size Guide

Customer Reviews

Recently Viewed

100% Australian Made

RECYCLED FABRICS

Afterpay

We acknowledge and pay respects to the Bundjalung people, the traditional custodians of the land on which we now operate at Tweed Heads and recognise their continuing connection to land, waters, and culture. We pay our respects to the first Australians and their elders past, present and emerging.