Hollis SMS 75 Sidemount Tech BCD

Hollis | SKU: 208.1375.003

Refer & Earn

$829.95

Shipping calculated at checkout.

In stock — ships from Irvine, CA

Size

S/M (Small / Medium) L/XL (Large / X-Large) 2XL (2X-Large)

Pickup available at In Store

Usually ready in 2 hours

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.

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Save with Open Box or Used Purchase

Open Box Hollis SMS75 Complete - Single PKG

Sale price $663.95 Regular price $829.95

Product Information

The Hollis SMS75 Sidemount Tech BCD is a harness and wing built for sidemount diving in both cave and open-water environments, featuring a trapezoid-shaped wing that promotes horizontal trim, cam slots for a single cylinder, and 11" (28 cm) grommets for banded doubles.

Who it is for

This BCD suits technical and recreational sidemount divers who need a configuration that works equally well in a cave system or open water. It is built around rigging a single cylinder on cam slots or banded doubles on 11" grommets, and it also supports rear-mounted tank configurations, so it adapts as a diver's setup or environment changes.

Key details

Trapezoid-shaped wing positions lift toward the hips to encourage horizontal trim.
Adjustable, removable wing bungee lets a diver tailor the fit of the wing.
Cam slots accept a single sidemount cylinder; 11" (28cm) grommets accept banded doubles.
Reversible inflator and dump assembly with an inner-located elbow keeps hardware clear of overhead environments.
Sternum and crotch straps are included for a secure, stable harness fit.

Compatibility and sizing

The SMS75 is offered in S/M, L/XL, and 2XL. S/M fits divers roughly 5'5" to 6' tall, 120 to 170 lbs, with a 30" to 42" chest and 28" to 38" waist. L/XL fits divers roughly 5'7" to 6'2" tall, 150 to 200 lbs, with a 36" to 48" chest and 32" to 42" waist. 2XL fits divers roughly 6' to 6'5" tall, 190 to 260 lbs, with a 44" to 58" chest and 36" to 46" waist. The harness is also compatible with the Hollis SMS Deco Rigging Kit and the SMS50/SMS75 Rail Kit, both sold as accessories.

What's in the box

SMS75 harness and wing
Rigging kit: tank bungees, stainless steel cam bands, stainless steel bolt snaps, nylon line
Sternum strap
Crotch strap

DiveCatalog.com is an authorized Hollis dealer and a dive shop in Irvine, California, operating since 2003. Call or chat with us at 888-701-4017 if you have questions about sizing or rigging compatibility before you buy.

⚠️ 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 should a scuba BCD fit?

A BCD should fit snugly enough that it does not ride up toward your ears when inflated, while still letting you breathe fully. Fasten the waist and cummerbund first, then adjust the shoulder straps so the tank sits close to your back and the shoulders cannot slide off. With the BCD fully inflated at the surface you should still be able to take a deep, comfortable breath; if it squeezes your chest, loosen it or move up a size.

How do I rinse and care for a BCD after diving?

Rinse the outside in fresh water and also flush the inside of the bladder, because salt water gets in through the inflator and dump valves. Fill the bladder roughly a third full of fresh water through the oral inflator, slosh it around, then drain it out through the inflator and each dump valve. Hang it to dry out of direct sunlight and store it partially inflated so the bladder walls do not stick together.

Should I use integrated weights or a weight belt?

Integrated weight pockets carry the lead in the BCD itself, which many divers find more comfortable and easier on the hips, while a weight belt keeps the weight independent of your BCD. Either way, you must be able to release your ditchable weight quickly with one hand, and your buddy should know how your system releases. Non-ditchable trim pockets are useful for balance but should never hold weight you might need to drop.

How do I pack a BCD for travel?

Make sure the BCD is completely dry inside and out before packing so it does not mildew in transit. Remove all weights, deflate it fully, and fold or roll it around softer items such as a wetsuit to cushion the inflator and valves. Avoid hard creases in the air cell, and unpack and air it out as soon as you arrive.

When does a BCD need to be serviced?

Follow the service interval in the manufacturer's manual, which is commonly an annual inspection alongside the rest of your life-support gear. Have the inflator, dump valves, and bladder checked any time the inflator sticks, free-flows, feels rough, or the BCD holds air poorly. Between services, confirm that it inflates and deflates properly as part of every pre-dive check.

What is the difference between a jacket-style and a back-inflate BCD?

A jacket-style BCD holds air in panels that wrap around your sides as well as your back, while a back-inflate BCD keeps the entire air cell behind you. Jacket styles tend to feel very stable and upright at the surface, and back-inflate styles keep the chest clear and are often preferred for horizontal trim underwater. Neither is objectively better, so treat it as a fit and preference decision and try both if you can.

Will my BCD fit any scuba tank?

Most recreational BCDs use an adjustable cam band sized for common single-cylinder diameters, so standard aluminum and steel tanks generally work. Re-check the band tension after the first wetting, because webbing can relax slightly and let the tank shift. If you dive doubles or unusual cylinder diameters, confirm compatibility with the manufacturer before assuming it will hold.

What size Hollis SMS75 do I need?

The SMS75 comes in S/M, L/XL, and 2XL based on height, weight, chest, and waist. S/M fits divers about 5'5" to 6' tall and 120 to 170 lbs, L/XL fits about 5'7" to 6'2" and 150 to 200 lbs, and 2XL fits about 6' to 6'5" and 190 to 260 lbs. Check chest and waist measurements too, since harness fit depends on both.

Can the Hollis SMS75 be rigged with doubles instead of a single sidemount tank?

Yes. The SMS75 uses cam slots for a single sidemount cylinder and 11" (28cm) grommets for banded doubles, and it also supports a rear-mounted tank configuration. This lets one harness cover single-tank sidemount, doubles, and back-mount setups depending on how it is rigged.

What comes included with the Hollis SMS75?

Each SMS75 ships with the harness and wing, a rigging kit containing tank bungees, stainless steel cam bands, and stainless steel bolt snaps with nylon line, plus a sternum strap and a crotch strap. This covers the hardware needed to rig a basic sidemount setup out of the box.

Is the Hollis SMS75 made for cave diving, open water, or both?

The SMS75 is designed for both cave and open-water sidemount diving. Its inner-located inflator elbow keeps hardware clear of overhead environments typical in cave diving, while the trapezoid wing and configurable cylinder mounting also suit open-water sidemount dives.

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tengo casi un a...

tengo casi un año con el sms 75 y me parece para aguas abiertas perfecto, tanto para buceo recreacional como para dar clase e sidemount, ademas su facilidad de configurarlo para montaje trasero.