





See Options
Need help? Ask our experts.
The Fourth Element 5mm Proteus II Men's Full Wetsuit is recognized for its superior performance, excellent thermal protection, and minimized water ingress thanks to its Hydrolock inner neck seal and Glideskin wrist seals. Its seams are double glued, blind stitched, and waterproof taped for additional thermal protection.
The Proteus II Wetsuit features additional Hexcore linings on the body core torso for enhanced thermal performance during prolonged water exposure. It also includes a Thermoflex thermal lining throughout the rest of the suit.
The Proteus II Wetsuit is designed with internal polyurethane (PU) ankle seals and ultra-stretch knee pads to protect high-wear areas without restricting flexibility. It also features a back zipper entry with a zipper tab leash for easy self-donning and doffing.
The Fourth Element Proteus II Men's Full Wetsuit is ideal for extended dives in temperatures of 66 Degree F (19 Degree C) and above.
Review Summary
Nylon-2 Neoprene Rubber
5mm
Double Glued, Blind Stitched & Taped
Back Zipper Entry w/Zipper Tab Pull Leash
3X-Large: 0661708255484 | X-Large: 661708255422 | Small Short: 661708255408 | X-Small: 0661708255446 | Large Tall: 0661708255354 | X-Large Short: 0661708255439 | X-Small Short: 0661708255453 | Large: 661708255330 | XX-Large: 661708255460 | Medium: 661708255361 | XX-Large Short: 0661708255477 | Medium Short: 0661708255378 | Large Short: 0661708255347 | Small: 0661708255392 | Small Tall: 0661708255415 | Medium Tall: 0661708255385
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 Fourth Element 5mm Proteus II Men's Full Wetsuit is the highest performing wetsuit on the market. This 5mm is often the benchmark to which other suits are compared in terms of warmth. By combining the now famous Hydrolock inner neck seal and Glideskin wrist seals, water ingress is minimized. Seams are double glued, blind stitched and waterproof taped to provide outstanding thermal protection throughout the dive. Additional Hexcore linings on the body core torso provide enhanced thermal performance where it is most needed for prolonged water exposure. Thermoflex thermal lining throughout rest of suit.
The 5mm suit is a versatile performer. Internal polyurethane (PU) ankle seals and ultra-stretch knee pads protect a high-wear area without restricting flexibility. With improved fit and thermal performance, the suit is easier to don then the classic Proteus, but its thermal performance is even better. Fourth Element recommends the 5mm suit for prolonged dives in temperatures of 66 Degree F (19 Degree C) and warmer. 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