The O’Three 65 Semi-Dry Diving Wetsuit represents the very best of O’Three’s expertise in neoprene design and wetsuit technology. Made with three densities of dive-grade neoprene, it offers excellent flexibility, minimal compression, and maximum warmth, ensuring comfort across a wide range of diving conditions.
Internally, the torso is lined with Thermal Plush for added insulation and faster drying times, while strategically placed stretch panels enhance mobility. Externally, durable 210D fabric reinforces high-wear areas like the seat and knees, with PU laminate for extra protection. Triple-glued and blind-stitched seams create a watertight barrier, while the storm guard and YKK HD back zip further prevent water ingress.
The unisex design features O’Three’s ergonomic tailoring for a precise fit, plus seals at the wrists, neck, and zip for added thermal protection. This wetsuit has been proven in record-breaking dives and is trusted for its performance, durability, and comfort.
Key Features
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6/5mm Dive-Grade Neoprene – Three densities for warmth, flexibility, and durability
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Thermal Plush Torso Lining – Extra insulation and quicker drying
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Triple-Glued & Blind-Stitched Seams – Watertight and durable
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210D Reinforcement Panels – Tough protection on seat, legs, and knees
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Stretch Panels – Flexible neoprene in key movement areas
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Floating Collar & Glide Skin Seals – Comfortable, secure seals at neck and wrists
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YKK HD Back Zip with Storm Guard – Reliable, watertight closure
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Unisex Fit – Ergonomic tailoring for comfort and performance
Benefits
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Exceptional warmth for UK and overseas diving
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Flexible and comfortable without sacrificing durability
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Reinforced in high-wear areas for long-lasting performance
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Watertight seams and seals reduce flushing and heat loss
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Trusted by record-breaking divers for performance in extreme conditions
Ideal For
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UK divers in cooler waters (14–18°C) from early summer to mid-autumn
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Divers heading abroad to the Red Sea, Mediterranean, or similar waters in winter
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Recreational and advanced divers seeking a premium semi-dry suit
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Anyone wanting maximum warmth, comfort, and durability in a wetsuit
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Unisex Size Guide
| Mens | Height | Chest | Waist | Hip |
| Small | 5’4″ – 5’6″ 162 – 167cm |
34″ – 36″ 86 – 91cm |
27″ – 29″ 69 – 74cm |
32″ – 34″ 81 – 86cm |
| Medium | 5’8″ – 5’10″ 172 – 177cm |
38″ – 40″ 97 – 101cm |
31″ – 33″ 79 – 84cm |
36″ – 38″ 91 – 97cm |
| Medium Tall | 5’10″ – 6’0″ 177 – 182cm |
38″ – 40″ 97 – 101cm |
31″ – 33″ 79 – 84cm |
36″ – 38″ 91 – 97cm |
| Medium Large | 5’10″ – 6’0″ 177 – 182cm |
40″ – 42″ 101 – 107cm |
33″ – 35″ 84 – 89cm |
38″ – 40″ 97 – 101cm |
| Large | 6’0″ – 6’2″ 182 – 187cm |
42″ – 44″ 107 – 112cm |
35″ – 37″ 89 – 94cm |
40″ – 42″ 101 – 107cm |
| Extra Large | 6’2″ – 6’4″ 187 – 193cm |
44″ – 46″ 112 – 117cm |
37″ – 39″ 94-99cm |
42″ – 44″ 107 – 112cm |
| 2XL | 6’3″ – 6’5″ 189 – 196cm |
46″ – 48″ 117 – 122cm |
39″ – 41″ 99-104cm |
44″ – 46″ 112 – 117cm |
| 3XL | 6’4″ – 6’6″ 194 – 198cm |
48″ – 50″ 122 – 127cm |
41″ – 43″ 104-109cm |
46″ – 48″ 117 – 122cm |
