"It's weightless, you just don't feel it's there and the insulation is incredible. The silky fabric doesn't bind to other fabrics either, so although we just had it thrown over the top of our duvet without any ties, the Ultra tended to stay in place, our movement not affecting it much. It is a proper bit of outdoor kit and after 100 nights I would have no hesitation in packing this. It's light, adaptable, made of top class materials and the bottom line is that it's really bloody warm."
— Peter Macfarlane (a.k.a. Petesy).
"About 12 years ago, with a stroke of luck that escapes most climbers, I found myself married to a girl whose heart was in the mountains like mine. But the marital bed was not all roses, the marital bed was sleeping bags. Not good. But simply solved. You guys at PHD came to the rescue when we ordered a pair of 2m x 2m duvets made using the very latest technology, the lightest sleeping bag fabric filled with your very best quality goose down. Within two years we had spent close to 90 days in our tent, climbing in Ethiopia, surfing in Cornwall etc We have slept in the open, under one and on the other and despite our warmth, shaken the ice from the top duvet as we awoke. Although we are extremely well-equipped for the outdoors, of all the gear, it is these two duvets that have been coveted the most. Thank you for the quality you have added to our outdoor adventures."
— David and Katie (Iota Climbing).
"It's a lot more versatile than a sleeping bag - can be used by two people, one person, as a round-the-shoulders wrap on chilly evenings and is more comfy for sleeping as you don't feel restricted. Reckon it would be great also for trekking and staying in hostels and huts."
— Sarah Stirling, Adventure travel writer, Trip to New Zealand and Australia (Fraser Island).