Five lifejackets covering every real sailing use case — premium offshore, all-purpose cruising, budget, kids, and dinghy. Plus the buying guide that explains 150N vs 170N, hammer vs hydrostatic, why sprayhoods matter, and the harness D-ring nobody mentions until you try to clip on at 2 a.m. in a force 7.
Spinlock Deckvest 6D
Best overall~£260· 170N· Auto (hammer)· 1.4 kg
The UK cruising and RYA-instructor benchmark for the last decade. 170N inflation, integrated harness D-ring, fitted sprayhood, Pylon lifejacket light. Slim profile that does not restrict movement at the helm.
Why pick it
If you sail in UK / Northern European waters and want one lifejacket that does everything correctly without thinking, the Deckvest 6D is the default answer. The sprayhood is the unsung hero — keeps spray and breaking water out of your face when you are in the water waiting for recovery.
Watch out
Hammer (bobbin) activation rather than hydrostatic — needs replacement every 3 years and can trigger if soaked by heavy spray. Acceptable trade for the price, but consider VITO if you regularly take green water across the deck.
Spinlock Deckvest VITO
Best premium (offshore)~£330· 170N· Auto (hydrostatic)· 1.6 kg
Spinlock's top-tier offshore vest. Hydrostatic inflation (only triggers when properly submerged, not just wet), Lume-On bladder lights, integrated AIS MOB and PLB pocket, full harness, sprayhood.
Why pick it
Offshore, ocean-passage, or anyone who takes regular green water on deck. Hydrostatic activation prevents false inflations from spray, rain, or accidental immersion. The PLB/MOB integration pockets are properly thought through — no improvised attachments needed.
Watch out
Significantly more expensive than the 6D. Hydrostatic inflators cost more to service. Overkill for inshore and coastal day-sailing where the cheaper auto-hammer Deckvest is genuinely fine.
Crewsaver Crewfit 165N Sport
Best budget cruising~£95· 165N· Auto (hammer)· 1.0 kg
The budget cruising staple. 165N automatic inflation, harness D-ring for tethering, low-profile fit. No sprayhood, no light included as standard — those are optional add-ons.
Why pick it
Charter boats, weekend cruising, the second-or-third spare on a family boat. At ~£95 you can equip a four-person crew for what one Deckvest VITO costs. Properly RYA-compliant for inshore and coastal use.
Watch out
Sprayhood and light are extras. Buying both pushes the price near £140 — still cheaper than the Deckvest 6D but not by as much as the headline suggests. Lacks the build refinement of the Spinlock range.
Spinlock Deckvest Cento Jr.
Best for kids~£180· 100N· Auto (hammer)· 0.7 kg
Properly sized for children 20–50 kg. 100N inflation (correct for the weight range), harness D-ring, fitted sprayhood, adjustable to grow with the child.
Why pick it
The only premium sailing lifejacket on the UK market sized correctly for children. Most so-called kids' lifejackets are oversized adult foam vests that ride up to the chin. This one fits properly, has a real harness D-ring, and the kid will not take it off after 20 minutes.
Watch out
Children grow out of the size range quickly — budget for a replacement every 2–3 years. Light is sold separately. The 100N rating is correct for under-50 kg but not enough for a heavier adolescent — switch to an adult 150N+ when they reach the upper weight limit.
Helly Hansen Sport Comfort
Best foam (dinghy / inshore)~£60· 50N· Foam· 0.6 kg
Foam buoyancy aid (50N) — not a lifejacket in the strict sense. Does not turn an unconscious casualty face-up. Designed for active dinghy sailing, paddleboarding, kayaking, and casual day-boat use where you are a competent swimmer in the water.
Why pick it
Dinghy racing, hot-weather day sailing, tender use, paddleboard / kayak. The reduced bulk lets you actually move, which matters when you are sailing a Laser or hiking out on a 470. No inflation mechanism = no service interval, no replacement cost.
Watch out
50N is buoyancy aid territory, not lifejacket. Will not float you face-up if unconscious. Wrong choice for offshore, cruising, single-handed sailing, or any scenario where you might end up in the water unable to swim.
Buoyancy in Newtons — 50N / 100N / 150N / 170N / 275N
The ISO 12402 standard sets five levels. 50N is buoyancy-aid only — fine for competent swimmers in benign water, no face-up turning. 100Nis the minimum "lifejacket" — turns most casualties face-up in calm water.150N is the standard cruising rating — turns face-up in typical seaway including with foul-weather gear.170N is the offshore standard — handles heavy oilskins, more reliable turn. 275N is for commercial work, heavy survival suits, and Arctic conditions. For sailing: 150N coastal, 170N offshore.
Hammer (bobbin) vs hydrostatic activation
Auto-inflating lifejackets fire when their inflator detects water. Hammer/bobbin activators dissolve a salt tablet in any water — including heavy spray, prolonged rain, or accidental immersion. Bobbins are cheap (~£10) and need replacement every 3 years. Hydrostaticactivators only fire when submerged below ~10 cm of water — so they won't false-trigger from spray or being dropped in a puddle. They cost more (~£40) and last longer between services. Hammer is fine for coastal and weekend cruising; hydrostatic is worth it offshore.
Sprayhood — the unsung hero
A sprayhood is a small spray-deflecting cone that pops up over your face when the jacket inflates. Most lifejacket fatalities in the water are not from drowning in the traditional sense — they are from inhaling spray and breaking water while waiting for recovery. The sprayhood prevents that. Spinlock includes them on the 6D and VITO as standard; Crewsaver sells them as a £15 add-on. Buy it. Always.
Harness D-ring — for clipping on, not optional
Every sailing lifejacket should have a stainless steel D-ring on the chest for a tether/safety line. This is the difference between a lifejacket and a lifejacket-with-harness. RYA and offshore racing rules require it. If the lifejacket you're considering doesn't have one, it's designed for powerboating or PWC use, not sailing. All five picks above have harness D-rings.
Light — required, often sold separately
A water-activated strobe or fixed light is required by SOLAS and most offshore racing rules. Spinlock builds the Pylon light in on the 6D and VITO; Crewsaver and most budget brands sell lights as £20–40 add-ons. The Spinlock Lume-On is widely regarded as the best — sticks to the bladder, activates on inflation, 8-hour runtime. Don't skip this.
PLB and AIS-MOB integration
Premium lifejackets (Spinlock VITO, Mustang HIT) have purpose-built pockets for personal locator beacons and AIS MOB devices. Cheaper lifejackets require you to improvise an attachment with shock cord, which is fine — until you go in the water and the device tears off. If you own (or plan to own) a PLB and an AIS-MOB, the integration is worth paying for. See our PLB buying guide for picks.
Service intervals — and what an annual service costs
All inflatable lifejackets should be serviced annually — visual inspection at home, plus a 3-yearly inflator and CO₂ cylinder replacement at a service centre. Expect ~£25–£40 per jacket per service. Self-service is allowed in the UK but takes 30 minutes of careful work per jacket and a service kit; most people prefer to pay. Skipping service is the most common reason lifejackets fail to inflate in real distress.
Fit — most adults need to try before they buy
Chest size matters more than weight for fit. Most adult lifejackets fit chests 70–140 cm. Women's-fit variants exist and are worth the small premium if you find the standard cut chafes the collarbone or rides high. Don't buy a lifejacket online for anyone you can't physically measure — return shipping for poor fit eats any saving.
150N or 170N — which do I need?
150N is the coastal-cruising standard and is fine for most UK and European sailing in light to moderate conditions. 170N is the offshore standard, with more reliable face-up turn when wearing heavy oilskins and seaboots. If you sail regularly in winter or offshore, go 170N. If you sail mostly summer day-trips, 150N is enough. The price difference is small.
Foam or inflatable?
Foam is bulky but maintenance-free and immediately buoyant — right for dinghy racing, kayaks, and any sailing where you expect to be in the water as part of the activity. Inflatable is slim and comfortable to wear all day but requires servicing and has failure modes (uninflated CO₂ cylinder, soaked bobbin) that foam doesn't. For cruising sailboats, inflatable is the right call; you wear it constantly because it isn't bulky.
Hammer or hydrostatic?
Hammer (bobbin) inflators are cheaper and trigger on any contact with water — including spray. Fine for coastal use; can false-fire if the jacket is stored damp or stowed wet in a locker. Hydrostatic inflators only trigger when submerged ~10 cm deep, so they ignore spray and rain. More expensive both upfront and at service. Worth the extra for boats that take regular green water on deck.
Can I service my own lifejacket?
Yes — at-home annual service is allowed in the UK for non-commercial craft. Procedure: visual inspect bladder, manually inflate for 16-hour hold test, weigh the CO₂ cylinder against the stamped weight, check bobbin date. The 3-yearly cylinder + inflator replacement is a £15 spares pack. If you have any doubt, send it to a service centre — a £30 service is cheap insurance.
When should I replace a lifejacket entirely?
A well-maintained inflatable lifejacket should last 10 years. Replace it earlier if: the bladder fails the 16-hour inflation test (slow leak); the webbing or harness D-ring shows UV damage or corrosion; the jacket has actually been fired in anger; or the manufacturer's recommended end-of-life date is past. Foam lifejackets last 5–7 years before the foam degrades.
Affiliate disclosure:The Amazon links on this page are affiliate links — Elio may earn a small commission at no extra cost to you. We have no commercial relationship with Spinlock, Crewsaver, or Helly Hansen. The picks above are the same ones we'd recommend to a friend. We re-test and refresh this guide each year.