When thickness is held constant, the meaningful differences become cut, flexibility, seam construction and water barriers. These five adult 5 mm models offer a focused fitting shortlist. The original BARE Nixie is kept separate from newer Nixie Ultra variants so the specifications are not mixed.
Updated · Manufacturer specifications and published review evidence
How we chose and ordered these picks
Currently documented construction and cuff details lead, followed by alternative cuts and the original Nixie listing. No insulation test has been performed by this site.
List position is an editorial recommendation, not a review score. The selection uses the documented features and limitations below. We have not personally tested this equipment. Verified publisher scores, where available, are shown separately and link to their evidence. Our catalogue is still being researched; inclusion does not mean a product has a completed scored review.
The shortlist at a glance
Choose a model to jump to its details. Compare the exact configuration before ordering.
The W40 is Waterproof’s blue 5 mm full wetsuit, built from Ultraflex neoprene and fitted with a hip pocket. It is aimed at temperate-water diving, with a close fit intended to reduce flushing. The pocket is a useful distinction from simpler full suits when you want somewhere to stow a small item without adding a separate pouch.
Thickness
5 mm
Material
Ultraflex neoprene
Intended conditions
Temperate water, subject to fit and personal exposure needs
Storage
Hip pocket
Colour
Blue
What to check
Fit around the lower back, neck and cuffs matters more than the colour or the stretch claim. Check that the pocket remains accessible with your BCD and does not pull awkwardly when loaded. Waterproof’s thermal claims do not establish a personal minimum water temperature, particularly for long or repeated dives.
No verified independent overall score yet. Compare the specifications and limitations above.
The men’s Fast 5 mm combines double-lined neoprene with stretchy arm panels and shaped legs. It has a back zipper with a GlideSkin backing and internal sealing rings at the wrists and ankles. This makes it a useful temperate-water fitting option if you prefer a straightforward full suit over a hooded semidry.
Thickness
5 mm
Construction
Double-lined neoprene; Ultra-Span arm panels
Entry
YKK back zip
Water barriers
GlideSkin zipper backing and inner cuff rings
Reinforcement
Anti-abrasion knee coating
What to check
ScubaLab found the close fit effective against water movement, but reported some effort getting the suit on and off. That is a more useful consideration than assuming every stretchy suit is effortless to dress in. Check cuff comfort, torso length and shoulder reach with the zip closed. The test’s Best Buy award is not a numeric overall grade.
No verified independent overall score yet. Compare the specifications and limitations above.
The men’s SSMC is Sherwood’s Marine Conservation 5 mm full suit, using Quantum Stretch neoprene with glued and blind-stitched seams. Abrasion-resistant knees and a rear zipper with a long pull cord are the principal practical features. The men’s version uses its own sizing and a topographical graphic rather than the women’s wave pattern.
Thickness
5 mm
Material
Quantum Stretch neoprene
Seams
Glued and blind stitched
Entry
Back zipper with long pull cord
Cut
Men’s; topographical graphic
What to check
ScubaLab liked the fit, movement and sealing of the Marine Conservation model in its 2024 test. Its Testers Choice award is not an overall numeric rating, and individual fit remains decisive. The conservation positioning also does not establish a specific donation per purchase unless the seller supplies those terms.
No verified independent overall score yet. Compare the specifications and limitations above.
The women’s SSMC is a 5 mm back-zip full suit made from Quantum Stretch neoprene. Its wave graphics distinguish it from the men’s version, while glued and blind-stitched seams and reinforced knees provide a straightforward construction. The women’s size chart should be checked independently of the men’s range.
Thickness
5 mm
Material
Quantum Stretch neoprene
Seams
Glued and blind stitched
Entry
Back zipper with long pull cord
Cut
Women’s; wave graphic
What to check
DIVEIN’s tester found comfortable mobility, a manageable collar and little flushing, but wanted more features and clearer information about conservation donations and production standards. Those observations are useful buying context, not a guarantee of fit. The accessible review gives a recommendation without a numeric overall score.
No verified independent overall score yet. Compare the specifications and limitations above.
This is BARE’s original women’s 5 mm Nixie full suit, SKU 002469, now listed in its outlet range. The manufacturer describes a proprietary neoprene blend and a women’s cut. It is a different listing from Nixie Ultra and the newer Ultra 2.0; the similar names can easily lead to the wrong review or specification.
Model identity
Original Nixie Full, not Nixie Ultra
Thickness
5 mm
Cut
Women’s full suit
Manufacturer SKU
002469
Catalogue placement
BARE Outlet / Womens Clearance
What to check
The current outlet page supplies little construction detail. Confirm the zipper, seams and lining on the actual stock before buying, and do not assume it has the mineral-based lining described in Nixie Ultra reviews. Clearance pricing is only useful when the suit fits and the seller’s return conditions work for you.
No verified independent overall score yet. Compare the specifications and limitations above.
Product research checked 2026-10-03. Specifications can change; confirm the exact model and package.
Before you buy
Compare the fit of each cut rather than converting size letters between brands.
Inspect the zip backing and cuff design.
Confirm exact model and availability when buying an outlet suit.
Take two or three suitable models from this list into a comparison, then remove any that fail your fit or compatibility checks. A lower position here can still be the better purchase for your setup. Check the product page for source dates and unresolved details before placing an order.
Will two 5 mm suits feel equally warm?
Not necessarily. Fit and flushing can change the experience considerably, and the nominal thickness does not describe every panel or seam.
