Lunasurf 4mm Surf Boot Yamamoto Cold Water Wetsuits

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Lunasurf 4mm Surf Boot Yamamoto Cold Water Wetsuits


Lunasurf 4mm Surf Boot Yamamoto Cold Water Wetsuits




100% Yamamoto Neoprene

We only use Yamamoto Neoprene - Why is this important?

Yamamoto began producing wetsuits in 1961, offering the first wetsuit material in Japan that combined both high functionality and flexibility at a time when wetsuits were primarily composed of the heavy and stiff rubber. Early customers included Japan’s Defense Agency and the famous female oyster divers of Japan’s fishing industry. These customers sought a wetsuit that allowed for greater mobility underwater, improved heat retention and a better wearing experience. A unique rubber material was developed and patented to resolve these problems. Japanese Neoprene is the worlds best. LIMESTONE NEOPRENE The major raw material of this Yamamoto rubber is limestone collected at Mt. Kurohime in Niigata Prefecture. This limestone originates from magma of a volcano eruption in the sea near the Island of Hawaii about 80 million years ago.

Yamamoto Technical Features



Yamamoto Corporation’s neoprene rubber is classified as “chloroprene rubber.” The special rubber incorporates an independent closed cell structure which adds high functionality including super light weight, high heat‐retention with good flexibility neoprene.



The closed cells are packed together at an extremely high density and each individual cell is filled with nitrogen gas to prevent water penetration and increase heat retention. The nitrogen closed cell content is over 93% — over 30% higher than most competing materials — and with virtually no water absorption means the weight of this rubber remains nearly identical in wet or dry conditions, giving you more warmth than thicker wetsuits without the weight.


Virtually no water absorption means the weight of this wetsuit remains nearly identical in wet or dry conditions, giving you more warmth than thicker wetsuits without the weight.





Quick dry, lightweight poly fibres that help insulate and retain body heat for longer periods. Specifically only used on the chest, back and hood keeping your vital core areas warm without sacrificing flexibility.


Quick drying silky smooth lining makes for a snug, super warm, lightweight, high performance wetsuit. We believe that to make a great wetsuit you need the best materials.


A thin comfortable 4-way high stretch neoprene tape. Placed on all interior seams minimising water entry and maximising warmth retention


Every seam has been glued and blind-stitched to reduce water entry and have excellent durability. Seams and panels have be strategically designed with flexibility and mobility as the focus Making for a non restricting comfortable wetsuit.


  • What countries do you ship to?

    We offer FREE standard shipping worldwide. You will also have the option to upgrade to premium DHL paid service for an express delivery.

  • Do you offer a warranty?

    We offer a 90 days warranty from the purchase date for all our wetsuit accessories. On the wetsuits we have a 12 month warranty on materials and manufacturing. We do not cover misuse, fin cuts or any damage caused by hitting the reef.

  • How do I care for my wetsuit and wetsuit accessories? (boots, gloves, mitts, caps)

    Wash it out with clean, cold water after every surf. Hang dry, not out in direct sunlight. Do not machine wash/dry. Don't use detergents.

  • Can I return my boots, gloves, mitts?

    Yes providing they have not been used or damaged. You are welcome to swap sizes if you didn't get it right first time. Return postage is your responsibility.

  • How does my wetsuit, boots, gloves, mitts work?

    Lunasurf wetsuits and accessories are awesome things, with today’s technology we can stay warm and have fun in the coldest of conditions. You can feel light, loose and warm unlike the wetsuits of yesteryear. Our wetsuits and accessories are 100% made using only the best Yamamoto Japanese limestone based neoprenes. That are then lined with a water/wind repelling buttery, stretchy lining that insulates you from the cold water water, air temps and winds. Your wetsuit, boot, glove, mitt is made up of panels of Neoprene. Wetsuits are not designed to keep you entirely dry. A small amount of water gets trapped between your body and the neoprene. Your body temperature then heats up this small amount of water giving you a nice warm feeling. This is why finding the correct fit is essential. Heat does eventually escape through the neoprene but very much like clothing the thicker the Neoprene the warmer you will be.

  • How do I find the right size boots for me?

    We have our own unique Lunasurf sizing for boots. Please refer to the size chart on the product page. It will explain further measuring up to find the perfect size Luna boot for you.

  • Is the 4mm boot ok for UK winters?

    Yes the 4mm boot was designed for UK winters. Men, women and children in Iceland, Norway and Scotland are doing full winters purely in the Lunasurf 4mm boot. If you are prone to the cold opt for the 8mm boot.



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