Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks

Name: Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks
Rating: 5.00 (4 reviews)

Hollis | SKU: 277.3000.004

Refer & Earn

⚠️ FINAL SALE - NO REFUNDS

$2,399.95

Shipping calculated at checkout.

In stock — ships from Irvine, CA

Size

Not sure of your size? Matched to Hollis’s size chart

Pickup currently unavailable at 23D

All Hollis size charts on one page. Imperial in bold, metric underneath.

Wetsuits

Hollis Neotek wetsuits

Weight and height

Size	Weight lb · kg	Height ft/in · cm
SM	135–150 61–68	5′6″–5′8″ 167–172
MD	155–170 70–77	5′8″–5′10″ 172–177
ML	165–180 74–81	5′9″–5′11″ 175–180
LG/SH	170–185 74–81	5′7″–5′9″ 170–175
LG	175–190 79–86	5′10″–6′1″ 177–182
XL/SH	185–200 81–88	5′8″–5′10″ 172–177
XL	190–205 86–92	5′11″–6′3″ 180–190
2XL	205–220 92–99	6′0″–6′3″ 182–190
3XL	230–260 104–117	6′1″–6′4″ 185–193

Chest, waist and hip

Size	Chest in · cm	Waist in · cm	Hip in · cm
SM	36–38 91–96	29–31 73–78	35–36 88–91
MD	38–40 96–101	31–33 78–83	37–39 93–99
ML	40–41 101–104	32–34 81–86	38–40 96–101
LG/SH	41–42 104–106	33–35 83–88	39–41 99–104
LG	41–42 104–106	33–35 83–88	39–41 99–104
XL/SH	42–44 106–111	35–37 88–93	41–43 104–109
XL	42–44 106–111	35–37 88–93	41–43 104–109
2XL	44–46 111–116	37–39 93–99	44–46 111–116
3XL	47–50 119–127	40–43 101–109	47–50 119–127

Drysuits

Hollis DX-300X drysuit

Weight and height

Size	Weight lb · kg	Height ft/in · cm
XS	120–145 54–66	5′3″–5′6″ 160–168
SM	135–155 61–70	5′6″–5′8″ 168–173
MD	150–175 68–80	5′7″–5′10″ 170–178
ML	170–195 77–89	5′9″–6′0″ 175–183
LG	185–210 84–96	5′10″–6′1″ 178–185
XL	210–240 96–109	5′11″–6′2″ 180–188
2XL	235–265 107–121	6′1″–6′4″ 185–193
3XL	260–295 117–134	6′2″–6′6″ 188–198

Chest, waist, hip and inseam

Size	Chest in · cm	Waist in · cm	Hip in · cm	Inseam in · cm
XS	32–36 81–91	26–30 66–76	32–36 81–91	26–28 66–71
SM	34–38 86–96	28–32 71–81	34–38 86–96	27–29 68–73
MD	37–40 94–101	30–34 76–86	35–39 89–99	28–30 71–76
ML	38–42 96–106	32–36 81–91	37–41 94–104	29–31 73–79
LG	40–44 101–112	34–38 86–96	39–43 99–109	30–32 76–81
XL	42–46 106–117	36–40 91–101	41–45 104–114	31–33 79–84
2XL	44–48 112–122	38–42 96–106	43–47 109–119	32–34 81–86
3XL	46–50 117–127	40–44 101–112	45–49 114–124	33–35 84–89

Boot size

Size	Boot size
XS	7
SM	7
MD	8
ML	9
LG	9
XL	10
2XL	11
3XL	11

Hollis men's AUG 450

Height

Size	Height ft/in · cm
XS	5′5″–5′8″ 165–172.5
SM	5′7″–5′10″ 170–178
MD	5′9″–6′0″ 175.5–183
LG	5′11″–6′2″ 180.5–188
XL	6′1″–6′4″ 185.5–193
2XL	6′3″–6′6″ 190.5–198
3XL	6′5″–6′8″ 195.5–203

Chest, waist and inseam

Size	Chest in · cm	Waist in · cm	Inseam in · cm
XS	30–34 76–86	23–27 58–68	30–31.5 76–80
SM	34–38 86–96	27–30.5 68–78	31–32.5 79–83
MD	38–41.5 96–106	30.5–34.5 78–88	32.5–34 82–86
LG	41.5–45.5 106–116	34.5–38.5 88–98	33.5–35 85–89
XL	45.5–49.5 116–126	38.5–42.5 98–108	34.5–36 88–92
2XL	49.5–53.5 126–136	42.5–46.5 108–118	36–37.5 91–95
3XL	53.5–57.5 136–146	46.5–50.5 118–128	37–38.5 94–98

Fins

Hollis F-1 fins

Size	Shoe size
REGULAR	7–9
XL	10–12
2XL	13–15

Hollis F-2 fins

Size	Shoe size
SMALL	4–6
REGULAR	7–9
XL	10–12

Source: Hollis’s size chart. Values in the second unit come from Hollis’s own chart (view, view) where it prints them.

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Payment & Security

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Save with Open Box or Used Purchase

Open Box Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks

Sale price $1,919.95 Regular price $2,399.95
Used Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks

Sale price $1,319.95 Regular price $2,399.95

Product Information

Hollis DX-300X Technical Expedition-Grade Drysuit is designed by technical divers, for technical divers. Developed over three years in demanding conditions, it delivers maneuverability and comfort while maintaining long-wearing durability for serious scuba and diving missions. The suit integrates a heavy-duty outer layer, a multi-layer water barrier, and a soft inner liner to balance warmth, mobility, and reliability in challenging environments.

The DX-300X combines a 12-layer Butyl Mass core with an outer Nylon Cordura shell, achieving dependable water tightness and resistance to chemicals and ozone. An inner silk-weave polyester liner offers easy donning and comfortable wear for extended dives, while the patented BIAS cut with a telescopic torso increases freedom of movement and reduces air migration. Wide flat seam construction minimizes leak-prone areas for safer diving gear performance.

Designed for expedition diving, it integrates a low-profile YKK zipper and SiTech silicone seals, including Neck Tite and Quick Cuff wrists, to maintain a secure seal and smooth operation under water. Practical features include two large Velcro bellows pockets with internal D-rings, double-thickness kneepads, 5mm neoprene socks, and adjustable suspenders for a tailored fit across conditions.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

5 stars: 4 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

So far so good

So far so good. The suit fits really well. Is very comfortable.
Don't make a stupid mistake that I did, make sure you look in the tech pockets for all the paperwork on the suit. I did not look in the pockets so all the paperwork went with me on my first dive with a suit🤪

I have owned ma...

I have owned many drysuits in the past. I originally picked up this one to be a back-up/traveling suit but I think this is now my goto drysuit. It is light and comfortable, easy to get on. The zipper is fantastic. It glides easily and has a low profile so it is less likely to catch on harnesses and accessories. The new oval wrist cuffs make getting my big hands in and out a breeze while still reducung the overall girth of the cuff. I am a big fan of silicone seals as well. I think Hollis really has a winner here.

I have owned ma...

Hands down the ...

Hands down the MOST comfortable dry suit I have worn (in and out of the water)! All in all the suit has some amazing features that make it an excellent buy:

Sizing chart

DiveCatalog.com

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Brand	Hollis
Model	DX-300X
Suit Type	Technical expedition-grade drysuit
Outer Shell	Nylon Cordura
Core	12-layer butyl mass
Inner Liner	Silk weave
Tear Strength	Over 300 N
Cut	Patented BIAS cut with telescopic torso
Zipper	YKK low profile
Neck Seal	SiTech Neck Tite silicone
Wrist Seals	SiTech Quick Cuff system
Pockets	Two large hook-and-loop bellows pockets with internal D-rings
Knees	Double-thickness kneepads
Socks	5 mm neoprene
Suspenders	Adjustable

Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks

Pick an accessory — 90% off with your $1000+ order

Payment & Security

Save with Open Box or Used Purchase

Product Information

Hollis DX-300X Technical Expedition-Grade Drysuit w/ 5mm Neoprene Socks

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