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

Hollis | SKU: HOL-277.3000.006+OB

Refer & Earn

Sale

⚠️ FINAL SALE - NO REFUNDS

$1,919.95 $2,399.95

Shipping calculated at checkout.

In stock — ships from Irvine, CA

Size

XL (X-Large)

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

Pickup currently unavailable at In Store

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 where it prints them.

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

$2502 items $5003 items $1,0005 items $1,5006 items $2,0008 items $3,00010 items $4,00012 items $5,00015 items

DiveCatalog.com Silicone Frameless Dive Mask
$59.95$6.00
DiveCatalog.com Retro Oval Dive Mask Without Nose Pocket Compensator
$44.95$4.50
DiveCatalog.com Classic Oval Dive Mask Silicone
$44.95$4.50
DiveCatalog.com Metal Coil Lanyard with Snap Clips
$39.95$4.00
DiveCatalog.com Junior Rubber Oval Dive Mask (15% smaller)
$34.95$3.50

90% off applies automatically at checkout on orders of $1000+ — or free for signed-in members. Not combinable with discount codes.

Condition Note

May be missing original packaging and minor blemishes (not noticeable after 1-2 dives). This product does not carry a valid manufacturer warranty.

Product Conditions

Open Box: This product is Open Box. It is generally unused, either returned by a customer or displayed in our showroom, and may have minor, unnoticeable blemishes. Original packaging may be damaged or missing.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Save with Open Box or Used Purchase

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

Regular price $2,399.95

Product Information

Designed by technical divers, for technical divers and developed over three years in a variety of demanding conditions, the DX-300X is maneuverable and comfortable while ensuring long wearing durability.

The DX-300X is the benchmark expedition-grade drysuit, with superior strength & comfort. Overall material weight is 700 g/sq. “Outer Layer” is a heavy duty Nylon Cordura which offers superior puncture and abrasion resistance with incredible tear strength in excess of 300N. The middle “Butyl Mass” is constructed of 12 layers to provide long-term water integrity with superb chemical & ozone resistance. “Inner Liner” is a silk weave polyester offering the optimum in comfort and softness with easy donning and doffing. Freedom of movement is optimized with panels cut on the material bias to provide 25% extra stretch than traditional trilam and a low profile and flexible YKK zipper.

Includes SiTech silicone neck and wrist seals for comfort and quick replacement. The suit is also fitted with two large thigh pockets (both with Velcro closure and 2?” d-ring), 3M reflective safety strips for visibility, double thick kneepads 5mm neoprene socks and internal suspenders.

⚠️ 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.

Frequently Asked Questions

How much does a drysuit cost?

Drysuit cost varies based on brand, materials, and technical features, and the DX-300X is positioned as an expedition-grade suit built with premium materials like a Nylon Cordura shell and a 12-layer Butyl Mass core. For current availability and fit guidance on this model, call DiveCatalog.com at 888-701-4017 or start a chat with the team.

What sizes does the Hollis DX-300X come in?

The DX-300X is offered in XS, S, M, ML, L, XL, 2XL, and 3XL. The suit also includes adjustable suspenders so divers can fine-tune the fit across different body types and base layer thicknesses within each size.

Can I replace the neck and wrist seals on the DX-300X myself?

Yes. The DX-300X uses SiTech silicone neck and wrist seals that are designed to be user-replaceable, so divers can swap damaged or worn seals without sending the suit to a repair center, keeping the drysuit mission-ready for expedition diving.

What kind of inflator and exhaust valves does the DX-300X use?

The DX-300X is equipped with a chest-mounted inflator valve and a shoulder-mounted exhaust valve, giving divers standard buoyancy control placement that is common on technical expedition drysuits for easy reach during a dive.

Does an "open box" purchase like the Oceanic Veo 4.0 computer still have a warranty/

DiveCatalog.com

Hi,

Thank you for reaching out to us! We appreciate your inquiry and value your business.

The backplate, SS Plate weighs 5.15 lb. Yes we offer 15% military discount on items that are not on sale or discounted!

If you have any further questions or need additional assistance, please don't hesitate to let us know. We're here to help!

Make sure you don't miss out on the great deals we have available! Reach out to see what you're looking for is on sale!

Sincerely,
Emily and the DiveCatalog team!
+1 (888)-701-4017

Brand	Hollis
Model	DX-300X
Condition	Open box
Suit Type	Technical expedition-grade drysuit
Outer Shell	Nylon Cordura
Core	12-layer butyl mass
Inner Liner	Silk weave
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 bellows pockets with internal D-rings
Socks	5 mm neoprene

Open Box 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

Frequently Asked Questions

How much does a drysuit cost?

What sizes does the Hollis DX-300X come in?

Can I replace the neck and wrist seals on the DX-300X myself?

What kind of inflator and exhaust valves does the DX-300X use?

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

Let customers speak for us