The Challenger Interlock 275 

The SOLAS approved Challenger Interlock 275 lifejacket in durable red Nylon fabric has been designed for use as a combined working/ abandonment lifejacket. This incredible lightweight and comfortable to wear lifejacket design gives excellent neck and head support which is particularly vital for an unconscious wearer.

With 300N buoyancy performance the lifejacket 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 interlocking lobe design also creates an effective wave barrier; preventing water channelling into the airways.

It features a durable red nylon cover with hook and loop closure making it easy to re-pack once activated. The Halkey Roberts automatic operating head is easily accessible and can be checked when required. Challenger Interlock lifejackets are now available with AIS 'Recovery System' integration.



  • 300N buoyancy
  • SOLAS approved
  • Twin chamber bladder system
  • Interlocking bladder with wave barrier technology
  • 2/3 bar stainless steel buckle
  • Stainless steel D ring (harness version only)
  • Lifejacket light
  • Buddy line
  • Halkey Roberts automatic inflation system
  • Adjustable fit


  • SOLAS approved
  • 330N buoyancy (actual)
  • 275N buoyancy (category)
  • Automatic gas inflation
  • Halkey Roberts Alpha Automatic firing head
  • Twin chambers

Design Options

  • A wide range of cover options including wipe clean heavy duty PVC, hard wearing nylon and fire resistant Panotex
  • Sprayhood
  • AIS beacon
  • Single Crotch strap
  • Extender belt

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-031 HR Std S/S Red Nylon
10-ISP-064S-037 HR S/S Deck Red Nylon
10-ISP-064S-032 HR Std S/S Orange PVC
10-ISP-064S-036 HR Auto Deck Orange PVC