Born Slippy™

Aptus 1.0. The Made-to-Measure Wetsuit.

Fewer. Better.

Built to be the best wetsuit on the planet, not the most.

Made to measure from 26 points
Yamamoto limestone neoprene
Micro-chamber thermal insulation
1,000 made worldwide

Build your Aptus 1.0

€1,295

A wetsuit has three jobs.

01Keep you warm.
02Let you move.
03Fit your body.

Too often, choosing one means compromising on another.

For decades, wetsuit insulation has relied on thicker neoprene and additional linings.

We wanted to explore a different approach.

Micro-chamber thermal insulation

The future isn’t fleece.

APTUS 1.0 incorporates micro-chamber thermal insulation in its torso panels.

The engineered chamber structure is designed to retain small insulating air pockets and stabilise a thin layer of body-warmed water close to the skin, supporting thermal insulation without relying on conventional bulky fleece linings.

The purple micro-chamber panel inside the torso of the Aptus 1.0 — Integrated into the torso panels.

Andrew “Cotty” Cotton

Tested where it matters.

Over 35 years of surfing experience, distilled into APTUS 1.0.

Developed with big-wave surfer Andrew “Cotty” Cotton, with prototype testing beginning at Croyde Bay, Devon, before continuing at Nazaré, Portugal.

His experience and feedback have helped shape the product’s development.

Prototype testingCroyde Bay, Devon
Continued atNazaré, Portugal

Big-wave surfer Andrew Cotton in the water wearing a Born Slippy wetsuit

Current allocation open

APTUS 1.0 is available to reserve now.

APTUS 1.0.

Japanese Yamamoto neoprene. Micro-chamber thermal insulation. Made to measure from 26 individual body measurements, or in a standard size.

Individually numbered. Limited to 1,000 worldwide.

When the final APTUS 1.0 is made, the line ends.

Build your Aptus 1.0

€1,295

The Aptus 1.0 wetsuit in Midnight Navy, full length, front view

As featured in

“Would You Pay $1,500 For a Wetsuit?”

Ben Mondy · SURFER · 27 October 2026

Read the article

Independent editorial coverage.

The anatomy of the Aptus 1.0.

Uncompromising materials, radical engineering, and absolute fit. Full construction details are in the configurator below.

The purple micro-chamber thermal insulation of the Aptus 1.0, close up — Micro-chamber thermal insulation.

Engineered chamber structure in the torso panels, designed to support thermal insulation without bulky fleece linings.

Yamamoto branding on the Midnight Navy neoprene of the Aptus 1.0 — Japanese Yamamoto neoprene.

Premium Japanese #40 and #39 closed cell limestone neoprene.

Aptus 1.0 cuff marked Custom 3/2mm — Made-to-measure fit. 26 measurements.

Custom: a pattern cut to your own 26 individual body measurements.

Shoulder and chest panel construction of the Aptus 1.0 in Midnight Navy — Shoulder construction and mobility.

Seamless upper torso pattern cut to match the full rotational arc of your paddling stroke.

Blindstitched seam on the Aptus 1.0, close up — Seams, reinforcement and AquaFlush drainage.

GBS seams, glued, blindstitched and triple-taped, with AquaFlush drainage at the ankle.

The Aptus 1.0 mark with the edition number 054 of 1000 — Individually numbered production.

Capped at 1,000 worldwide. When unit 1,000 ships, the Aptus 1.0 line ends.

Made for one. You.

Choose your fit. Custom (recommended) uses our individual 26-measurement fitting process. Standard offers a simpler option using our size guide.

Drag to rotate

Aptus 1.0 from €1,295 Paid in full when you reserve

As featured in SURFER: “Would You Pay $1,500 For a Wetsuit?”

Current allocation open Front

Detail

Choose your fit.

How would you like to be measured?

01 Build and reserve Choose your specification and reserve your production slot.
02 We check everything Every measurement profile is reviewed before production. If anything looks unusual, we contact you before your pattern is cut.
03 Into the workshop Your individual pattern is cut, your Aptus 1.0 is made, checked and dispatched.

Nothing to measure today. Reserve your Aptus 1.0 first and we’ll guide you through the rest.

Select your standard size

Size guide · Men

Size	Height	Weight	Chest	Waist
S Short	165–170 cm5'5"–5'7"	61–68 kg135–150 lb	91–97 cm36–38 in	74–79 cm29–31 in
S Regular	170–175 cm5'7"–5'9"	64–70 kg140–155 lb	91–97 cm36–38 in	74–79 cm29–31 in
S Tall	175–180 cm5'9"–5'11"	66–73 kg145–160 lb	91–97 cm36–38 in	74–79 cm29–31 in
M Short	170–175 cm5'7"–5'9"	70–77 kg155–170 lb	97–102 cm38–40 in	79–84 cm31–33 in
M Regular	175–180 cm5'9"–5'11"	73–79 kg160–175 lb	97–102 cm38–40 in	79–84 cm31–33 in
M Tall	180–185 cm5'11"–6'1"	75–82 kg165–180 lb	97–102 cm38–40 in	79–84 cm31–33 in
L Short	175–180 cm5'9"–5'11"	79–86 kg175–190 lb	102–107 cm40–42 in	84–89 cm33–35 in
L Regular	180–185 cm5'11"–6'1"	82–88 kg180–195 lb	102–107 cm40–42 in	84–89 cm33–35 in
L Tall	185–190 cm6'1"–6'3"	84–91 kg185–200 lb	102–107 cm40–42 in	84–89 cm33–35 in
XL Short	175–183 cm5'9"–6'0"	88–98 kg195–215 lb	107–112 cm42–44 in	89–94 cm35–37 in
XL Regular	183–190 cm6'0"–6'3"	88–98 kg195–215 lb	107–112 cm42–44 in	89–94 cm35–37 in
XL Tall	188–196 cm6'2"–6'5"	91–100 kg200–220 lb	107–112 cm42–44 in	89–94 cm35–37 in
XXL Regular	185–193 cm6'1"–6'4"	98–107 kg215–235 lb	112–117 cm44–46 in	94–99 cm37–39 in

Size	Height	Weight	Chest	Waist
4	152–160 cm5'0"–5'3"	43–50 kg95–110 lb	76–81 cm30–32 in	56–61 cm22–24 in
6	157–165 cm5'2"–5'5"	48–54 kg105–120 lb	79–84 cm31–33 in	58–64 cm23–25 in
8	163–170 cm5'4"–5'7"	52–59 kg115–130 lb	81–86 cm32–34 in	61–66 cm24–26 in
8 Tall	168–175 cm5'6"–5'9"	54–61 kg120–135 lb	81–86 cm32–34 in	61–66 cm24–26 in
10	168–173 cm5'6"–5'8"	57–64 kg125–140 lb	86–91 cm34–36 in	66–71 cm26–28 in
10 Tall	170–178 cm5'7"–5'10"	59–66 kg130–145 lb	86–91 cm34–36 in	66–71 cm26–28 in
12	170–175 cm5'7"–5'9"	59–70 kg130–155 lb	91–97 cm36–38 in	71–76 cm28–30 in
12 Tall	173–180 cm5'8"–5'11"	64–75 kg140–165 lb	91–97 cm36–38 in	71–76 cm28–30 in
14	173–180 cm5'8"–5'11"	66–75 kg145–165 lb	97–102 cm38–40 in	74–79 cm29–31 in
16	175–183 cm5'9"–6'0"	70–79 kg155–175 lb	102–107 cm40–42 in	79–84 cm31–33 in

Height. Barefoot against a wall, from the floor to the top of your head.
Weight. In light clothing, without shoes.
Chest. Around the fullest part of the chest or bust, under the arms, with the tape level.
Waist. Around the narrowest part of the torso, usually just above the navel.

Use a soft tape, snug but not tight, and ask someone to help. Between two sizes or outside the chart? Choose Custom and we make your Aptus 1.0 to your measurements.

01 Build and reserve Choose your specification and size, and reserve your production slot.
02 Into the workshop Your Aptus 1.0 is made in your standard size, checked and dispatched.

Fit Men

Thickness 3/2 mm

Colour Midnight Navy

Entry U-Zip

Need help choosing your setup? Talk to Born Slippy

Insulation

Micro-chamber thermal insulation

Introduced exclusively by Born Slippy

Integrated into the torso panels, the engineered chamber structure is designed to support thermal insulation without relying on conventional bulky fleece linings. Fitted to every Aptus 1.0 as standard.

A different approach to warmth. Built for consequence.

Optional

Added to your build and to the price above.

Photos for reference use only. Final product photography coming soon.

Base suit

Additions

Full order value

Total due today

Paid in full, which reserves your workshop production slot and begins the pattern work. Full terms at checkout.

One last thing

How did you hear about us?

Cancellation

You pay in full when you reserve your suit. You can cancel and receive a full refund before submitting your measurements. Once measurements have been submitted and individual pattern work has begun, change-of-mind cancellations are no longer accepted. Statutory consumer rights remain unaffected.

Made to measure
Made in your standard size
Personally reviewed before production
Direct support from Born Slippy throughout your fitting

Questions before ordering? Speak to us.

What happens next

Reserve
Fitting
Review
Production
Delivery

Built to be used. Supported after delivery.

Repairs, servicing and garment care are part of owning an Aptus 1.0, not an afterthought. Care and repairs

Delivery & customs. Complimentary shipping to eligible EU destinations and the United Kingdom. Elsewhere it is invoiced separately once your suit is ready. Production and delivery typically take an estimated 4–8 weeks following confirmation of your size or measurements and final specifications. Timelines may vary depending on production capacity and delivery destination.

Regional shipping and tax policy

Eligible EU destinations & United Kingdom. Complimentary shipping, sent Delivered Duty Paid. All import taxes, duties and VAT are covered by us, so the price at checkout is the final price.

International & rest of world, including Australia. Shipping is invoiced separately once your suit is ready, at the real courier rate for your address. Local import duties, customs fees, taxes and VAT are the customer’s responsibility on delivery.

European exceptions. Norway, Switzerland and Malta are not covered by our duty paid programme. Shipping is invoiced separately once your suit is ready.

Security. Secure checkout via Stripe. All biometric and anatomical data is handled under strict EU GDPR protocols.

Construction

The full technical detail of every Aptus 1.0. Open any line.

Micro-chamber thermal insulation A different approach to warmth. Built for consequence.

APTUS 1.0 incorporates an advanced micro-chamber thermal construction, introduced exclusively by Born Slippy. Integrated into the torso panels, the engineered chamber structure is designed to support thermal insulation without relying on conventional bulky fleece linings. Combined with premium Yamamoto neoprene and a made-to-measure fit, the construction forms part of our approach to technical performance. Developed and refined through real-world testing with Andrew Cotton.

Yamamoto limestone neoprene Premium Japanese neoprene. Selected by function.

APTUS 1.0 uses premium Japanese Yamamoto #40 and #39 closed cell limestone neoprene, with different grades positioned across the suit according to the performance required from each area.

Limestone-based neoprene Material choice starts at the source.

Yamamoto neoprene is manufactured using limestone-derived chloroprene rubber, providing the foundation for the flexibility, warmth and technical performance required from APTUS 1.0.

GBS triple-taped seams Glued, blindstitched, taped three times.

GBS, glued and blindstitched, with triple-taped seams for warmth, flexibility and durability.

Sealed construction Built for seam integrity.

APTUS 1.0 uses glued, blindstitched and internally reinforced seams to create a strong, low-profile construction designed around durability and water resistance.

Critical taping Reinforced where it matters most.

High-stress seam areas receive additional internal reinforcement to improve seam durability without adding unnecessary construction across the entire suit.

Melco reinforcement Strength where stress concentrates.

Internal reinforcement patches are positioned at critical seam junctions and high-load areas to distribute stress and strengthen points exposed to repeated stretching.

Shoulder articulation Cut for the paddling stroke.

Seamless upper torso pattern cut to match the full rotational arc of your paddling stroke. Designed to minimise rubber pull through the full range of motion, along with chest compression and shoulder fatigue on long paddle outs.

Reinforced knee pads Protection without unnecessary stiffness.

Flexible, abrasion-resistant knee panels reinforce one of the highest-wear areas of the suit while allowing the knee to move naturally.

Back knee grooves Engineered around movement.

Contoured grooves behind the knee allow the material to fold and articulate more naturally through deep flexion, reducing unnecessary resistance when moving on the board.

Anti-slip seals Designed to stay where it should.

Internal grip seals at the wrists and ankles help secure the cuffs against the body, reducing movement and helping limit water entry.

Fused edges Clean finish. Less bulk.

The cuffs are finished with fused neoprene edges for a precise, low-profile construction. The finish also helps protect the exposed neoprene foam at the wrists and ankles.

Aqua Flush Water in. Water out.

An integrated drainage panel at the ankle allows trapped water to escape rather than collect in the lower leg.

Drain holes Water out. Nothing unnecessary.

Strategically positioned drain holes allow trapped water to escape from the suit, helping prevent pooling and ballooning while maintaining a clean, low-profile construction.

Custom fit, 26 measurements Recommended. Your own pattern.

With Custom, your pattern is cut specifically to your body dimensions from 26 individual measurements, and every profile is checked by Born Slippy before production. Standard sizes use our size chart.

Individually numbered 1,000 worldwide. Then the line ends.

Capped at 1,000 total units worldwide, allocated as production capacity allows. When unit 1,000 ships, the Aptus 1.0 line ends. You own a rare piece of high performance equipment rather than a mass market commodity.

APTUS 1.0 construction Different materials. One system.

APTUS 1.0 combines made-to-measure patterning, Japanese Yamamoto neoprene, micro-chamber thermal insulation and reinforced seam construction into a single suit built around fit, movement, warmth and durability.

We want to make the best wetsuits, not the most wetsuits.

Fewer. Better.

Athlete testimonials

Founding athlete

“I’ve surfed some of the biggest waves on the planet and worn some of the best equipment ever made. Born Slippy is the wetsuit I choose to wear now. The custom fit is incredible, the micro-chamber thermal insulation is next level, and the Yamamoto neoprene feels like cashmere against your skin. It’s performance without compromise.”

Andrew “Cotty” CottonBig-wave surfer

Pierre Maixent mid-air on a watercraft against a setting sun

Athlete

“I’ve spent my life pushing the limits of what’s possible on the water. At that level, every detail matters. Your equipment has to work as hard as you do. That’s what I like about Born Slippy. A fresh approach to performance, where precision, innovation and attention to detail come together to create something exceptional.”

Pierre MaixentSeven-time World Freeride Champion & Founder, RISE Watercraft

Join the list for the next drop.

Leave your details and we will write to you the moment the next allocation opens, before it is announced anywhere else.

Direct Allocation

Every suit is assigned directly to the person who ordered it.
Eliminates commercial reselling, middleman markups, and gray market flipping.
Protects small batch production standards and authentic ownership.

Concierge & Garment Care

You work directly with our fit and service specialists.
Personal guidance from initial AI photo review to ongoing dedicated garment care programs.
Exclusive access to our certified European repair network to ensure long term suit integrity.

Private Dispatches

Priority access to each allocation before it is publicly announced.
Invitations to private gatherings and live ocean experiences.
Direct updates from athlete testing dispatches and prototype developments.

Build your Aptus 1.0

Aptus 1.0. The Made-to-Measure Wetsuit.<img src="/wp-content/uploads/aptus-logo-white.svg" alt="" width="686" height="119" decoding="async" fetchpriority="high">

A wetsuit has three jobs.

The future isn’t fleece.

Tested where it matters.

APTUS 1.0.<img src="/wp-content/uploads/aptus-logo-black.svg" alt="" width="686" height="119" decoding="async" loading="lazy">

The anatomy of the Aptus 1.0.

Made for one. You.

Choose your fit.

Optional

We want to make the best wetsuits, not the most wetsuits.

Athlete testimonials

Join the list for the next drop.

Direct Allocation

Concierge & Garment Care

Private Dispatches

Aptus 1.0. The Made-to-Measure Wetsuit.

APTUS 1.0.