Description
One Sidemount Rig. Your Choice of Buoyancy.
The Hollis Katana 2 is a streamlined, highly adjustable sidemount system designed for recreational, technical, cold-water, travel, and advanced sidemount diving.
The Hollis CRIB Custom Katana 2 gives you the same proven sidemount platform with two simple choices:
- Single or dual bladder
- Your preferred color
Its modular Quick Fit System, low-profile wing, integrated weighting, extensive attachment points, and one-size-fits-all harness make the Katana 2 an adaptable platform that can grow with your diving.
Whether you’re diving aluminum cylinders in warm water, steel cylinders in cold water, carrying decompression bottles, or moving into more advanced sidemount configurations, the Katana 2 provides a clean and highly adjustable foundation.
Choose Your Bladder Configuration
Single Bladder – 40 lb Lift
The standard Katana 2 uses a single low-profile bladder providing approximately 40 pounds of lift.
This configuration is ideal for divers who want a lightweight and streamlined sidemount system without unnecessary bulk.
For divers using a drysuit, the drysuit may also provide an independent source of buoyancy appropriate to their training and dive plan.
The single-bladder Katana 2 is an excellent choice for:
- Recreational sidemount diving
- Technical sidemount with appropriate redundant buoyancy
- Drysuit diving
- Warm- or cold-water sidemount
- Travel
- Aluminum or steel cylinders
Dual Bladder – 40 lb Lift Per Bladder
Upgrade to the dual-bladder Katana 2 for two independent buoyancy cells, each providing approximately 40 pounds of lift.
The dual-bladder system provides redundant buoyancy without requiring the diver to rely on a drysuit as a backup buoyancy source.
This makes it particularly useful for technical sidemount divers using wetsuits or other exposure protection that does not provide independently controllable buoyancy.
The dual-bladder configuration includes separate inflation systems for the independent buoyancy cells.
Quick Fit System – One Size Fits All
Forget traditional BCD sizing.
The Hollis Katana 2 features the Quick Fit System (QFS), allowing the harness to be adjusted across the torso, lumbar area, waist, shoulders, and crotch strap to accommodate a wide range of diver body types.
The harness can be configured in either:
Y-Style Configuration
A minimalist harness arrangement favored by divers who want maximum simplicity and freedom of movement.
H-Style Configuration
Allows the addition of a chest strap for increased upper-body stability.
The result is a true one-size-fits-all sidemount platform that can also be readjusted when switching between exposure suits.
Streamlined 40 lb Wing
The Katana 2 wing is designed to remain tight against the diver’s body rather than creating unnecessary bulk behind the diver.
Its low-profile design helps reduce drag while supporting the horizontal trim sidemount divers want.
The system includes strategically positioned dump valves that allow the diver to vent expanding gas while maintaining proper trim.
Integrated Central Weight System
Proper ballast placement is critical to good sidemount trim.
The Katana 2 incorporates a central weight pocket positioned along the spine that can hold up to approximately 20 pounds of hard or soft weight.
Placing ballast directly along the diver’s centerline helps maintain balance while reducing the need for weights positioned elsewhere on the harness.
This can be especially valuable when diving:
- Drysuits
- Heavy thermal undergarments
- Steel cylinders
- Cold-water configurations
Designed for Proper Cylinder Positioning
A 7 mm bungee system holds the cylinders securely against the diver’s sides for a clean, streamlined profile.
Multiple lower attachment points allow the rig to accommodate different cylinder types.
The harness incorporates:
- Two bent shoulder D-rings
- Two hip D-rings
- Two offset lower D-rings
- Two crotch-strap D-rings
- Two back D-rings
This arrangement gives divers multiple options for attaching primary cylinders, steel cylinders, aluminum cylinders, decompression bottles, accessories, reels, lights, and other equipment.
Sidemount Rebreather Compatibility
The Katana 2 also incorporates mounting points along the inner wing for compatible sidemount rebreather configurations.
This helps make the Katana 2 a platform capable of supporting divers as they progress into more advanced technical diving applications.
Customize Your Color
Choose the Katana 2 color combination that fits your personal setup.
Available colors may vary depending on Hollis inventory and current production availability.
Custom colors may be special-order and may require additional lead time.
Key Features
- Fully adjustable one-size-fits-all sidemount system
- Choice of single- or dual-bladder configuration
- 40 lb lift with single bladder
- 40 lb lift per bladder with dual configuration
- Quick Fit System (QFS)
- Y-style or H-style harness configuration
- Low-profile streamlined wing
- Up to 20 lb central spine weight capacity
- 7 mm cylinder-retention bungee
- Extensive D-ring and equipment attachment points
- Suitable for aluminum and steel cylinders
- Compatible with recreational and technical sidemount configurations
- Sidemount rebreather mounting capability
- Custom color options
- Pre-assembled sidemount platform
Technical Specifications
Brand: Hollis
Model: Katana 2
BCD Type: Sidemount
Sizing: One size fits all via Quick Fit System
Single-Bladder Configuration
Lift Capacity: Approximately 40 lb / 18.1 kg
Buoyancy Cells: 1
Dual-Bladder Configuration
Lift Capacity: Approximately 40 lb / 18.1 kg per bladder
Buoyancy Cells: 2 independent bladders
Primary Benefit: Redundant buoyancy capability
Harness
Harness Configuration: Y-style or H-style
Cylinder Retention: 7 mm bungee
Central Weight Capacity: Approximately 20 lb / 9.1 kg
D-Rings
- 2 bent shoulder D-rings
- 2 hip D-rings
- 2 offset lower D-rings
- 2 crotch-strap D-rings
- 2 back D-rings
Waist Closure: Single buckle
Compatibility: Integrated mounting points for sidemount rebreather configurations
Warranty: Hollis standard 2-year warranty




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