At a glance
Pluses: Superlight, warm, next-skin-comfort, straps to mattress
Minuses: Expensive

440g

Features: This ultralight quilt is filled with 240g of responsibly-sourced 900-fill Nikwax Hydrophobic goose down. It has a tapered footbox which extends to mid-calf, and a single elastic strap which secures the quilt to a sleeping pad. A snap button on the top of the quilt secures it around the shoulders to trap heat. The bag is EN tested to 5°C (comfort). 

Fit: The footbox may feel narrow to some, but the quilt is wide and spacious, allowing comfort in most sleeping positions. 

Comfort: The Vesper is a damn comfortable quilt. At 440g, it feels almost weightless, and the 10D nylon ripstop is lush. The freedom of movement for side-sleepers is unbeatable. 

In use: Weighing less than a block of butter, the Vesper is ludicrously light and packs down to the size of a pineapple. For ultralight summer trampers, it’s truly a game-changing piece of kit, and when paired with a warm sleeping mat it should keep users warm nearly year-round.

As a side sleeper, I never had both feet in the footbox at once – except when resting or reading before sleep. It didn’t feel restrictive, but it may for those who sleep with their feet together. With one foot anchoring the footbox to prevent the quilt riding up, I was free to sleep as I would with a blanket, and found the experience to be far more comfortable than a sleeping bag. The snap button feels sturdy and withstood the night’s rustle and tussle without popping open. It makes a big difference to warmth by trapping warm air around the neck and shoulders.

Temperature regulation is a breeze – simply stick an arm or leg out, fold a corner down, or flap the quilt up and down to draw in cooler air. 

Value: The Vesper disappointingly retails for the same price as the temperature equivalent Therm-a-Rest sleeping bag – the Hyperion – despite being less versatile. If the weight saved in the pack keeps you from needing future knee replacements, however, it may pay for itself in time. 

Verdict: An ultralight, ultra-comfortable sleep system, that will win over sleeping bag users.