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Ride Engine’s all-new Onsen line of wetsuits is constructed with 100% Yamamoto #40 neoprene. Protecting and preserving our oceans, seas, and rivers— our playgrounds, our livelihoods, our sacred spaces— drives Ride Engine’s efforts to develop and build our wetsuits with materials that are uncompromising in sustainability, lifespan, and performance.

And that commitment has led Ride Engine to Yamamoto, the global leader in sustainable limestone-based neoprene. The Yamamoto #40 neoprene used in our Onsen wetsuits is significant for several reasons, both in terms of the environment and performance.


Limestone replaces the petro chemicals found in other neoprene. Minimal Water
Retention: The closed-cell geometric structure of the #40 neoprene has minimal
water retention (99.7% water impermeable), resulting in a wetsuit that’s warmer
(the cell structure has better heat retention, so a 3/2 can perform in water
temperatures that you would normally need a 4/3) and lighter (less water
absorption) and dries extremely fast.

Maximum Flexibility
The #40 neoprene is one of Yamamoto’s most flexible, which ensures our
Onsen wetsuits move as smoothly as you do and provide the highest-level of
restriction-free movement.

Higher Memory Value
Onsen wetsuits fit better and hold up longer than oil-based neoprene suits,
thanks to #40’s honeycomb structure.

No Chemicals
Solvent-free lamination of the Yamamoto #40 neoprene liners eliminate
harmful Volatile Organic Compounds (VOCs), and no toxic hydrophobic
coatings or laminations mean that all Ride Engine wetsuits are C-Free
materials (free of C8, C6 and C4).