Hollis BCDs

Hollis BCDs — Modular Buoyancy Systems for Technical and Recreational Diving

Most BCD lines are built around a single configuration and stretched to cover every diver. Hollis takes a different approach: a modular backplate-and-wing philosophy that lets you build a buoyancy system specifically matched to your diving — single tank or doubles, recreational or technical, travel-light or expedition-ready — using interchangeable harnesses, wings, and accessories rather than a fixed jacket design. This is the same philosophy that has made Hollis one of the standard names in technical and sidemount diving worldwide.

At DiveCatalog.com, we carry the current Hollis BCD lineup: recreational back-inflate BCDs, the modular Elite, ST, DT, and HTS harness/wing systems, sidemount rigs, and the Light Travel System. DiveCatalog.com is an authorized Hollis dealer.

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The Hollis BCD Range

Recreational Back-Inflate

The HD-200 Heavy Duty is Hollis's rugged recreational back-inflate BCD, built for divers who want a simple, durable rig without modular complexity. The LTS (Light Travel System) is purpose-built around minimizing weight and packed bulk for divers managing strict airline baggage allowances, without compromising the back-inflate design's streamlined in-water profile.

HTS 2 — Harness Tech System

The HTS 2 is an entry point into Hollis's modular technical philosophy in a back-inflate BCD format — bringing harness-style adjustability and a technical mindset to a more accessible, single-tank configuration.

Elite 2 — Harness System

The Elite 2 is a standalone harness system (sold without backplate) for divers building a fully custom backplate-and-wing rig from individually selected components — harness, plate, and wing chosen and matched independently rather than purchased as a fixed bundle.

ST and DT Wing Systems — Single and Dual Tank

The ST (Single Tank) system is available in multiple lift capacities (22 lb and 35 lb wings, with and without travel-oriented configurations) for divers running a single cylinder who still want a true backplate-and-wing setup. The DT (Dual Tank) system, available in 45 lb and 50 lb lift capacities, is built for doubles configurations — the standard technical diving setup for extended-range and overhead-environment dives. Both systems share a common harness platform, so divers can switch between single and doubles configurations without replacing the entire rig.

SMS 75 and SMS Katana 2 — Sidemount Systems

The SMS 75 is Hollis's lighter sidemount rig, suited to travel and warmer-water sidemount diving with smaller cylinders. The SMS Katana 2 (available in single and dual configurations) was developed in direct collaboration with cave explorer Edd Sorenson and uses a distinctive Quick Fit System for rapid, repeatable rig adjustment — a meaningful advantage when fine-tuning trim and cylinder position matters as much as it does in cave and wreck sidemount diving.

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Choosing Your Hollis Configuration

Diver Type	Recommended System	Key Reason
Recreational diver wanting simplicity	HD-200	Durable, straightforward back-inflate design; no modular complexity
Frequent travel diver	LTS Light Travel System	Minimizes packed weight and bulk without sacrificing back-inflate performance
Diver transitioning into technical configurations	HTS 2 or ST System	Harness-based adjustability; single-tank wing options for a technical mindset
Technical diver running doubles	DT 45 or DT 50 System	Dual-tank lift capacity built for extended-range and overhead diving
Sidemount divers	SMS 75 (travel) or SMS Katana 2 (cave/technical)	Purpose-built sidemount geometry; Katana's Quick Fit System for fine trim control
Divers building a fully custom rig	Elite 2 Harness (no backplate)	Mix and match harness, plate, and wing independently

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Why Buy Hollis BCDs from DiveCatalog.com?

• Authorized Hollis dealer — genuine products, full manufacturer warranty
• Full modular range — harnesses, wings, backplates, and sidemount systems available individually or as complete sets
• Expert configuration advice — our team can help you spec the right wing lift capacity and harness for your diving
• Fast shipping — in-stock items ship within one business day
• Financing available — for premium technical wing systems
• Rewards program — earn points on every purchase

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Frequently Asked Questions — Hollis BCDs

What is the difference between the ST and DT systems?

ST (Single Tank) wings are built for a single cylinder configuration, available in 22 lb and 35 lb lift capacities. DT (Dual Tank) wings are built for doubles — two cylinders banded together — in 45 lb and 50 lb lift capacities, the standard configuration for technical and extended-range diving. Both use a shared harness platform.

Do I need a backplate separately?

Some Hollis harness systems (like the Elite 2) are sold without a backplate, allowing you to choose your plate material and style independently. Other configurations come as complete sets with backplate included. Check the specific product listing, or contact us to confirm what's included before ordering.

What is the Quick Fit System on the SMS Katana 2?

It's Hollis's adjustment system developed with cave explorer Edd Sorenson, designed for rapid, repeatable fine-tuning of cylinder position and trim on a sidemount rig — important for cave and technical divers who need precise, consistent rig setup across multiple dives.

Can I use a Hollis wing with a non-Hollis backplate and harness?

Hollis components are generally compatible with standard backplate-and-wing mounting hardware used across the technical diving industry, but exact compatibility can vary by specific model. Contact us before mixing brands to confirm fit.

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Browse the full Hollis BCD collection above and reach out if you'd like help configuring the right harness, wing, and lift capacity for your diving.