Key Features

  • Improved fit and thermal performance
  • Hexcore thermal lining on torso
  • Thermoflex thermal lining throughout rest of suit
  • Taped, waterproof seams
  • Hydrolock neck seal system
  • Internal ankle seals
  • Glideskin wrist seals
  • Ultra stretch knee pads

Fourth Element Proteus II 3mm Men's Wetsuit

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Fourth Element PROTEUS II 3mm

ADVANCED WETSUIT TECHNOLOGY

The warmest 3mm dive wetsuit on the market according to independent testers.

The Hydrolock neck seal minimises water ingress combined with the Hexcore thermal lining to maximise warmth.

The Proteus II is arguably the highest performing wetsuit on the market and 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 minimised.

Seams are double glued, blind stitched and taped to provide outstanding thermal protection throughout the dive. Additional Hexcore 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.

We recommend water temperatures of 23C (73F) and warmer, but we know of many divers who take it into much cooler waters. To get more out of any wetsuit in colder waters, combine it with a Thermocline vest and shorts underneath and use a hood (3mm or 5mm).

I have used this suit for the past 4 years on my over seas trips on dives that can last upto 90 minutes in temperatures ranging from 25 degrees C in Bali to 31 degrees C in the Maldives.  The extra step of wearing the hydrolock over the neck allows this suit to keep me warm across that temperature range.  It will be getting packed soon for this years tips to Great Barrier reef and the Philippines.

We do not keep all of the wetsuit sizes in our warehouse.  If there is a size that you would like, then get in touch and we will see if we can order it for you.

A women's 3mm version of this suit is available, but ladies tend to opt for the 3mm Xenos for its extra easy donning and doffing.


Mens size chart

Sizes Height   Chest   Waist   Inside Leg*  
  Inches Cm Inches Cm Inches Cm Inches Cm
XS Short 5'3"-5'6" 161-169 30-34" 76-86 23-27" 58-68 28.5-30.5" 73-77
XS 5'5"-5'8" 165-172.5 30-34" 76-86 23-27" 58-68 30-31.5" 76-80
S Short 5'5"-5'8" 165-172.5 34-38" 86-96 27-30.5" 68-78 30-31.5" 76-80
S 5'7"-5'10" 170-178 34-38" 86-96 27-30.5" 68-78 31-32.5" 79-83
S Tall 5'9"-6'0" 175.5-183 34-38" 86-96 27-30.5" 68-78 32.5-34" 82-86
M Short 5'7"-5'10" 170-178 38-41.5" 96-106 30.5-34.5" 78-88 31-32.5" 79-83
M 5'9"-6'0" 175.5-183 38-41.5" 96-106 30.5-34.5" 78-88 32.5-34" 82-86
M Tall 5'11"-6'2" 180.5-188 38-41.5" 96-106 30.5-34.5" 78-88 33.5-35" 85-89
L Short 5'9"-6'0" 175.5-183 41.5-45.5" 106-116 34.5-38.5" 88-98 32.5-34" 82-86
L 5'11"-6'2" 180.5-188 41.5-45.5" 106-116 34.5-38.5" 88-98 33.5-35" 85-89
L Tall 6'1"-6'4" 185.5-193 41.5-45.5" 106-116 34.5-38.5" 88-98 34.5-36" 88-92
XL Short 5'11"-6'2" 180.5-188 45.5-49.5" 116-126 38.5-42.5" 98-108 33.5-35" 85-89
XL 6'1"-6'4" 185.5-193 45.5-49.5" 116-126 38.5-42.5" 98-108 34.5-36" 88-92
XL Tall 6'3"-6'6" 190.5-198 45.5-49.5" 116-126 38.5-42.5" 98-108 36-37.5" 91-95
XXL Short 6'1"-6'4" 185.5-193 49.5-53.5" 126-136 42.5-46.5" 108-118 34.5-36" 88-92
XXL 6'3"-6'6" 190.5-198 49.5-53.5" 126-136 42.5-46.5" 108-118 36-37.5" 91-95
XXXL Short 6'3"-6'6" 190.5-198 53.5-57.5" 136-146 46.5-50.5" 118-128 36-37.5" 91-95
XXXL 6'5"-6'8" 195.5-203 53.5-57.5" 136-146 46.5-50.5" 118-128 37-38.5" 94-98

 Womens size chart

Sizes UK Sizes USA Height   Chest   Waist   Hips   Inside Leg*  
    Inches Cm Inches Cm Inches Cm Inches Cm Inches Cm
6 X Short 4 X Short 5'1"-5'4" 155-162.5 27-30" 68-76 20-23" 51-59 30-33" 76-84 26.5-28" 67-71
6 Short 4 Short 5'2"-5'5" 157.5-165.5 27-30" 68-76 20-23" 51-59 30-33" 76-84 27-28.5" 69-73
6 4 5'3"-5'6" 160-168 27-30" 68-76 20-23" 51-59 30-33" 76-84 28-29.5" 71-75
8 X Short 6 X Short 5'2"-5'5" 157.5-165.5 29 -32.5" 74-82 22.5-25.5" 57-65 32.5-35.5" 82-90 27-28.5" 70-75
8 Short 6 Short 5'3"-5'6" 160-168 29 -32.5" 74-82 22.5-25.5" 57-65 32.5-35.5" 82-90 28-29.5" 71-75
8 6 5'4"-5'7" 162.5-170 29 -32.5" 74-82 22.5-25.5" 57-65 32.5-35.5" 82-90 28.5-30.5" 73-77
10 X Short 8 X Short 5'3"-5'6" 160-168 31.5-34.5" 80-88 25-28" 63-71 34.5-38" 88-96 28-29.5" 71-75
10 Short 8 Short 5'4"-5'7" 162.5-170 31.5-34.5" 80-88 25-28" 63-71 34.5-38" 88-96 28.5-30.5" 73-77
10 8 5'5"-5'8" 165-173 31.5-34.5" 80-88 25-28" 63-71 34.5-38" 88-96 29.5-31" 75-79
12 Short 10 Short 5'5"-5'8" 165-173 34-37" 86-94 27-30.5" 69-77 37-40" 94-102 29.5-31" 75-79
12 10 5'6"-5'9" 167.5-175 34-37" 86-94 27-30.5" 69-77 37-40" 94-102 30.5-32" 77-81
12/14
(12 top/
14 bottom)
10/12
(10 top/
12 bottom)
5'6"-5'9" 167.5-175 34-37" 86-94 29.5-32.5" 75-83 39.5-42.5" 100-108 30.5-32" 77-81
14 Short 12 Short 5'6"-5'9" 167.5-175 36-39.5" 92-100 29.5-32.5" 75-83 39.5-42.5" 100-108 30.5-32" 77-81
14 12 5''7"-5'10" 170-178 36-39.5" 92-100 29.5-32.5" 75-83 39.5-42.5" 100-108 31-32.5" 79-83
16 Short 14 Short 5''7"-5'10" 170-178 38.5-41.5" 98-106 32-35" 81-89 41.5-45" 106-114 31-32.5" 79-83
16 14 5'8"-5'11" 172.5-180 38.5-41.5" 98-106 32-35" 81-89 41.5-45" 106-114 32-33.5" 81-85
18 Short 16 Short 5''7"-5'10" 170-178 41-44" 104 -112 34.5-37.5" 87-95 44-47" 112-120 31-32.5" 79-83
18 16 5'8"-5'11" 172.5-180 41-44" 104 -112 34.5-37.5" 87-95 44-47" 112-120 32-33.5" 81-85
20 Short 18 Short 5''7"-5'10" 170-178 43.5-46.5" 110-118 36.5-40" 93-101 46.5-49.5" 118-126 31-32.5" 79-83
20 18 5'8"-5'11" 172.5-180 43.5-46.5" 110-118 36.5-40" 93-101 46.5-49.5" 118-126 32-33.5" 81-85