The SECUMAR Window ALPHA 275 lifejacket is more compact and comfortable than ever before. The new buoyancy chamber design makes the lifejacket about 10 cm shorter. With a detachable neck patch, there will be no more chafing in the neck. A smooth fleece patch offers agreeable comfort of wearing. The neck patch can be detached, washed and replaced at any time. The SECUMAR Window ALPHA 275 consists of a single buoyancy chamber, with a flat neck part to allow complete freedom of movement for all activities. When the lifejacket is inflated the back strap adjusts automatically and ensures an optimal fit of the lifejacket.
-A control window integrated into the protective cover allows checking of the inflation device at any time.
-The lifejacket fits snugly to the body, non-bulky. – Donning and Doffing is very easy with the new SECUMAR CLICK-Buckle (SECUMAR development).
| Performance Class (ISO 12402) | 275 N |
| Method of Inflator | Automatic inflator 4001S |
| Buoyancy | 290 N |
| CO₂-Cartridge | 60 g CO₂ Dock |
| Standard equipment | Protective cover, neck fleece (detachable, washable), oral valve, whistle, front zip pocket, pocket for nametag, lifejacket storage bag |
| Integral harness | No |
| Closure | Front click buckle |
| Crutch strap | Optional |
| Spray Hood | No |
| Emergency light | Optional |
| Integral pocket for ELT | No |
| Inspection window | Yes |
| Lifting becket | Yes |
| Size / Bodyweight | over 40 kg |
| Buoyancy bladder | Classic |
| Type of buoyancy | Inflatable |
| Type of clothing | Dry suits |
| Approval | CE |
| 3M® reflective strips | Yes |
| Back section | Vertically adjustable back strap |
| Protective cover | Polyamide |
| Buoyancy bladder type | buoyancy chamber bright orange |













