The Psycho Tech is built for the absolute harshest conditions and allows the user to surf for hours on end.* O’Neill’s Psycho Tech range focuses on ultimate warmth and durability with high-performance materials and water-tight double-sealed stitchless seams. The TB4 Firewall technology radiates throughout with TB4 Duraskin Air Firewall in the chest and back to shield against the cold while retaining and recirculating your body heat. Designed to keep you in the water longer, toasty, and stoked.
FEATURES
- FUZE Closure (Chest Zip Entry System)
- Redzone Water Resistant Zip (Preventing Water Entry)
- 360-Degree Barrier With Drain Holes ( Keeping The Cold Water Out Of The Wetsuit)
- Fluid Seam Weld Stitchless Seam Technology
- Fully Taped TB4 Seams – Arms / Shoulders / Shins / Calf Technobutter 4 Neoprene (Incredible Flexibility)
- Chest / Back Technobutter 4 Air-Firewall Smoothskin
- Thigh / Butt Technobutter 4 Firewall
Men’s wetsuits
| O’Neill product size | Height (cm) | Weight (kg) | Chest (cm) | Waist (cm) |
| 2XS | 168-173 | 52-59 | 90-93 | 70-72 |
| XS | 170-175 | 57-64 | 93-95 | 72-75 |
| SS | 166-171 | 59-68 | 95-99 | 75-79 |
| S | 173-178 | 61-70 | 95-99 | 75-79 |
| ST | 183-188 | 66-75 | 95-99 | 75-79 |
| MS | 169-174 | 66-75 | 99-104 | 79-84 |
| M | 175-180 | 70-77 | 99-104 | 79-84 |
| MT | 185-191 | 73-82 | 99-104 | 79-84 |
| LS | 171-177 | 73-82 | 104-110 | 84-89 |
| L | 178-183 | 77-86 | 104-110 | 84-89 |
| LT | 188-193 | 82-91 | 104-110 | 84-89 |
| XLS | 174-179 | 82-91 | 110-117 | 89-94 |
| XL | 180-185 | 86-95 | 110-117 | 89-94 |
| XLT | 191-196 | 91-100 | 110-117 | 89-94 |
| 2XL | 183-188 | 95-104 | 117-123 | 94-99 |
| 3XL | 183-191 | 104-113 | 123-130 | 99-112 |
| 4XL | 185-193 | 113-122 | 130-136 | 112-122 |
How to measure
Chest: With you arms relaxed by your side, measure around the fullest part of you chest
Waist: Measure around your natural waistline.
Hips: Measure around the fullest part at the top of your hips.
Inseam: Using pants that fit well, measure from the crotch seam to the bottom of the leg.




