Men’s ARK Ornö™ 02
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Our flagship suit ORNÖ™ has been tested and trusted by the world’s best swimrun athletes since launch 2017. ARK athletes Fredrik Axegård and Alex Flores wore the suit when they set the world record time at ÖTILLÖ Swimrun World Championships 2018.
A stripped racer with no unnecessary additions. Designed with the single purpose of making you move as smoothly and quickly as possible even through the hardest conditions. ORNÖ™ is the most buoyant and the warmest model in the ARK suit range.
- Premium Yamamoto LIMESTONE neoprene
- Low weight
- Running+
- Master buoyancy belt - 4 mm AIR
- Anti-leak construction - total
- UltraFlex inner liner
- Glide skin coating
- Separate arm sleeves included
Weight: 580 g (men’s size M)
World’s fastest swimrun suit
The name ‘Ornö’ is in honor of the legendary island Ornö, which is the location for the longest running distance during the ÖTILLÖ Swimrun World Championships. This phase of the race puts not only most athletes to the tests but also the running capabilities of the suit.

Low weight
580 g
Low weight is key in swimrun and our main topic when it comes to product development. ORNÖ™ is designed to keep the lowest weight without compromising on buoyancy and warming capacity. The suit weighs 580 g (men’s size M).
Material combination
Yamamoto LIMESTONE neoprene
The upper body is made of glide skin neoprene from Yamamoto. The neoprene gives you thermal protection and reduces drag. The combination of premium neoprene with UltraFlex inner liner makes the suit extremely soft and flexible. Legs are made of thinnest double-lined neoprene for maximum flexibility and high durability.
Running+
ORNÖ™ is designed with pro-running properties. The thin and flexible neoprene in the legs gives you the freedom needed when running, equivalent to running in short running tights.
Anti-leak construction
ARK’s signature anti-leak cut minimizes water to enter and allows you to keep dry. This means we can use thinner neoprene and still keep the same warming properties as if using thicker (and heavier) neoprene.







The master buoyancy belt
The signature ARK “master buoyancy belt” panel is strategically placed below the lunges and around the core. The construction gives you stability and makes the suit stay in place while swimming. The panel is made of 4 mm AIR cell neoprene for optimal buoyancy.

Neck cut
Neck and collar part is designed to seal when swimming. The shape is constructed to snug even when moving around a lot in the water.

Arm cuffs
Arm ends are equipped with a unique cuff construction. The 0.5 mm cuff will close tightly around the upper arm with a smooth and compact fit.

Taped seams
Stretch tape is placed on seams to reduce the risk of chafing.

Ultra-stretch liner
Ultra-stretch liner makes the neoprene extremely flexible.

Front zipper
Robust YKK №10 front zipper.

Stripped design
ORNÖ™ has no pockets or extra added implements to keep the suit as streamlined and fast as possible.

Separate arm-sleeves
ORNÖ™ is designed with separate arm-sleeves which makes it easy to customize depending on climate without compromising on the fit. The sleeves are made of 1 mm glide skin neoprene.
Size guide
Weight Height | 60 kg | 65 kg | 70 kg | 75 kg | 78 kg | 81 kg | 84 kg | 87 kg | 90 kg | 95 kg | 100+ kg |
---|---|---|---|---|---|---|---|---|---|---|---|
160 cm | XS | XS | XS | XS | S | S | S | S | M | M | L |
165 cm | XS | XS | XS | S | S | S | S | M | M | M | L |
170 cm | XS | S | S | S | S | S | S | M | M | L | L |
175 cm | S | S | S | S | S | S | M | M | M | L | L |
178 cm | S | S | S | S | S | S | M | M | M | L | L |
181 cm | ST | ST | ST | ST | ST | M | M | M | L | L | L |
184 cm | ST | ST | ST | ST | ST | MT | MT | MT | L | L | L | 187 cm | ST | MT | MT | MT | MT | MT | MT | L | L | L | L | 190 cm | MT | MT | MT | MT | MT | MT | MT | L | L | L | L | 193 cm | MT | MT | MT | MT | MT | MT | L | L | L | L | L | 196+ cm | MT | MT | MT | MT | MT | MT | L | L | L | L | L |
ST = Small/Tall
MT = Medium/Tall
Please note:
The size chart is just a guide. Since the fit is most individual you should try the suit. Our suits are flexible, if you are between two sizes we recommend you to take the smaller size.