Aqualung Axiom i3+ Men’s Scuba Diving BCD

The Aqualung Axiom i3+ is a jacket-style, weight-integrated BCD for men, part of the Axiom Series and listed here in a Black/Grey/Red finish. What sets it apart from most recreational jackets is the inflation control: instead of a corrugated hose with a button on the end, it uses Aqualung's i3 Plus side lever.

Who this suits

Recreational single-tank divers who want a jacket that fits properly out of the bag. The buckles are listed as swiveling and auto-adjusting, which is aimed at the diver who gears up in a hurry on a moving boat and does not want to re-thread straps between dives.

It also suits anyone who finds a conventional inflator hose fiddly. The i3 lever moves inflation and venting onto one control at your side, so adjusting buoyancy stops being a hunt for a hose above your shoulder.

Skip it if you dive sidemount, run doubles, or want a backplate and wing you can reconfigure. This is a recreational jacket and the spec sheet claims nothing beyond that. Skip it too if you have years of muscle memory on a standard inflator and no wish to relearn the motion, because the lever is a different habit rather than a better version of the same one.

The i3 Plus lever, and what it changes underwater

The listing describes inflation as a pull on the lever and venting as a push that needs no twisting. That second half matters more than it sounds. On a standard jacket you often have to lift and rotate the corrugated hose above the level of the bubble before the dump valve will do anything, which means breaking whatever position you were holding.

With a side lever, the same correction happens without moving your upper body. Both hands stay free for a camera, a line or a buddy check.

The trade-off is that this is a proprietary system. Every rental jacket you pick up on a trip will have the hose you stopped using, so keep the standard skill sharp even if the lever becomes your default.

Ditching weight: SureLock II and a single tug

Weight integration is Aqualung's SureLock II system, and the release is listed as a swift single-tug release. One pull, both pockets, no fumbling for a Velcro flap.

That is the whole point of a ditchable system. If you need lead off in a hurry near the surface, the difference between a single positive pull and a two-stage catch is measured in seconds you may not have.

The listing also states that tank weight is distributed across the harness rather than hanging off your shoulders, which is what stops a full cylinder from feeling like it is trying to walk down your back on the surface swim out.

Fit and trim: the harness, the tank band and the bladder

The inner harness is Aqualung's Wrapture Harness, and the fit is described as custom-tailored with auto-adjusting torso buckles. Ride-up is the standard complaint about jacket BCDs: the bladder inflates, the whole unit climbs toward your ears, and you spend the safety stop pushing it back down. An anchored inner harness is the usual answer to that.

The cylinder sits in a GripLock Tank Band, and streamlining comes from a Bladder Retraction System that pulls the bladder inward as it empties instead of letting it balloon out at your sides. Less width in the water is less drag, which you notice on a long swim or in current rather than on a drift.

Which version this page covers

This page covers the men's cut in Black/Grey/Red, from the Axiom Series. The attributes list no size, so the size is set by whichever retailer row you buy from. Check it on that retailer's own page before ordering, because a BCD in the wrong torso length undoes every fit feature above.

The bottom line

The case for the Axiom i3+ is the lever and the harness. Buoyancy control on one hip, weight off in one tug, and a jacket built to stay where you put it are all worth having on recreational dives.

The case for pausing is what Aqualung does not publish here. The spec sheet names systems but gives no lift figure, no ditchable weight capacity and no size chart, and those are the numbers that decide whether a BCD actually works with your exposure suit and your cylinder. Get lift and weight capacity for your size confirmed by Aqualung or the retailer, then buy with confidence.

Nothing on this spec sheet is aimed at technical diving, and Aqualung makes no claim that it is.

Specifications