Trusted by professional triathletes
ONELong-Sleeve Wetsuit
For WomenBeginner Performance
R 4,650.00R 6,450.00
Save R 1,800
Pre-order — ships in 7–10 working days
Material Yamamoto Neoprene
Colour Black / Blue
Size: L
Women’s ONE Long Sleeve wetsuit in black with blue and white accents, front angled view, featuring Rocket Science Sports branding.

Starting out in triathlon or open water swimming can feel intimidating. The RSS ONE is built to make that first step easier — and to take you well beyond it.

Balanced buoyancy keeps you in a better swimming position. Flexible materials let you move freely. The result is a wetsuit that stays out of your way so you can focus on your swim, not your gear. Real triathlon performance, without the elite-level price tag.

Buoyancy: Strategically placed panels lift your hips and legs, reducing drag and improving body position in the water.

Flexibility: Stretch zones at the shoulders and arms allow a full, unrestricted swimming stroke.

Warmth: 3mm neoprene construction keeps you comfortable in colder open water.

Fit: Anatomical cut designed for triathlon performance — snug without restriction.

Designed for: Beginner to intermediate triathletes, open water swimmers, and athletes training for their first race.

Hover a zone or row to see what each thickness does for you.

Find your size using your height and weight. Between sizes? Going down gives a faster, race-focused fit. Going up gives more comfort and ease of movement.

If you fall between standard sizes, our + sizes offer alternative proportions. Message us via the chat box for a personal fit recommendation.

Size Height Weight Chest
XS155-160 cm48-54 kg78-83 cm
S160-165 cm54-60 kg83-88 cm
M165-170 cm60-66 kg88-93 cm
L170-175 cm66-73 kg93-98 cm
XL175-180 cm73-80 kg98-104 cm
2XL180-185 cm80-88 kg104-110 cm
How to measure: Stand straight, measure chest at the widest point with a relaxed breath. Use cm for accuracy.
Still not sure of your size?
Take the size quiz Chat with us

Rinse in fresh water after every use to remove salt, chlorine, or sand.

Hang dry inside-out, away from direct sunlight.

Never machine wash, tumble dry, or store while wet.

Avoid sharp fingernails and rough surfaces — neoprene punctures don't repair well.

Store flat or on a wide hanger when fully dry.

Free shipping on orders over R 1,500 within South Africa. Standard delivery 2-5 business days.

30-day return window for unworn items in original packaging. See our full returns policy for details.

Free shipping on orders over R 1,500
30-day easy returns
Need help? Chat with our team