





See Options
Need help? Ask our experts.
The Proteus II is unique in its class due to its advanced features such as Glide-Skin wrist seals, hydro-lock inner neck seal, and Hex-Core linings. These features provide superior thermal protection and water resistance, making it perform more like a 5mm suit.
The suit minimizes water ingress through a combination of design features. These include Glide-Skin wrist seals, hydro-lock inner neck seal, and watertight seams that are double glued, blind stitched, and taped.
The recommended water temperature for this suit is 23-degrees C (73-degrees F) and above. However, many divers have reported using it in significantly cooler waters.
The Proteus II is equipped with a back zipper entry and a zipper tab leash, which facilitate easy self-donning and doffing.
The suit features Thermoflex linings throughout for superior thermal protection and comfort. It also has additional Hex-Core linings on the body core for enhanced thermal performance during prolonged water exposure.
Review Summary
Nylon 2 Neoprene Rubber
3mm
Double Glued, Blind Stitched & Taped
Back Zipper w/Pull Tab Leash
661708255187, 0661708255194, 0661708255279, 0661708255316, 0661708255293, 0661708255248, 0661708255231, 0661708255323, 661708255224, 661708255262, 661708255170, 0661708255255, 0661708255286, 661708255200, 0661708255217, 661708255309
Fourth Element Men's Proteus II Full Wetsuit Size Chart
| XS | XSS | S | ST | SS | M | MS | MT | L | LS | LT | XL | XLS | 2XL | 2XLS | 3XL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Height (ft/in) | 5'5"-5'8" | 5'3"-5'6" | 5'7"-5'10" | 5'9"-6'0" | 5'5"-5'8" | 5'9"-6'0" | 5'7"-5'10" | 5'11"-6'2" | 5'11"-6'2" | 5'9"-6'0" | 6'1"-6'4" | 6'1"-6'4" | 5'11"-6'2" | 6'3"-6'6" | 6'1"-6'4" | 6'5"-6'8" |
| Chest (in) | 35-37 | 35-37 | 37-39 | 37-39 | 37-39 | 39-41 | 39-41 | 39-41 | 41-43 | 41-43 | 41-43 | 43-45 | 43-45 | 45-47 | 45-47 | 47-49 |
| Waist (in) | 29-31 | 29-31 | 31-33 | 31-33 | 31-33 | 33-35 | 33-35 | 33-35 | 35-37 | 35-37 | 35-37 | 37-39 | 37-39 | 39-41 | 39-41 | 41-43 |
| Inside Legs (in) | 30-31 | 29-30 | 31-33 | 33-34 | 30-31 | 33-34 | 31-33 | 34-35 | 34-35 | 33-34 | 35-36 | 35-36 | 34-35 | 36-37 | 36-37 | 37-38 |









The Proteus II is a worthy successor to the original Proteus suit by Fourth Element. Available in 3mm thickness, the Proteus II is set to redefine the warmest suit in its class. Water ingress is minimized by a number of design features. Glide-Skin wrist seals and the now famous hydro-lock inner neck seal combine with watertight seams which are double glued, blind stitched and taped to keep the water out. Thermoflex linings throughout the suit provide excellent comfort and thermal protection. Additional Hex-Core linings on the body core provide enhanced thermal performance where it is most needed for prolonged water exposure.
The 3mm suit is probably the only 3mm in the world to feature such advanced features, allowing it to perform more like other 5mm suits with greater flexibility, and less buoyancy. Fourth Element recommends water temperatures of 23-degrees C (73-degrees F) and warmer, but they know of many divers who take it into much cooler waters. Suit has a back zipper entry with zipper tab leash for easy self-donning and doffing. The Proteus II is available in multiple sizes.
https://fourthelement.com/terms-and-conditions
207-935-1670
Pressure-Free Fit
Comfort guarantee
30/90 FREE Returns
Worry-free returns
Best Price Guaranteed + 5% OFF
Submit a price match