Challenger Interlock 275 Series III Offshore

The SOLAS approved Challenger Interlock 275 Non Harness is specially designed for the Oil and Gas market  constructed using a highly durable but flexible PVC orange cover fabric making it ideal for professionals working in the highly abrasive oil and gas environments.

This incredibly lightweight and comfortable to wear lifejacket design gives excellent neck and head support which is particularly vital for an unconscious wearer. With 300 Newtons of buoyancy it is designed to be worn when the user is wearing heavy duty clothing or with an abandonment suit, where it guarantees to self right the wearer in less than 5 seconds.

The patented interlocking lobe design also creates an effective wave barrier preventing water channelling into the airways.



  • 300N twin chamber
  • Interlocking bladder
  • SOLAS 2010 approval
  • Plastic buckle
  • Sprayhood fitted
  • Lifejacket light fitted
  • Single crotch strap
  • Packed into foil bag to support extended service


  • SOLAS approved
  • 300N buoyancy (actual)
  • 275N buoyancy (category)
  • Automatic gas inflation
  • Halkey Robers Alpha Automatic operation head
  • Twin chamber

WBT-100.pngWave Barrier Technology

The patented interlocking lobe design of the bladder used in this lifejacket self-rights the wearer in under 5 seconds and provides an effective Wave Barrier preventing water from being channelled into the airways. The tailored neck design gives vital support to head and neck, even if the subject is unconscious.

Ordering information

Part No. Description
10-ISP-064S-030 HR Std PB Red/Navy Foil Bag