PHD, or Peter Hutchinson Designs, is an outdoor clothing and equipment company. It specializes in down sleeping bags and down jackets but also makes synthetically insulated sleeping bags and jackets, outerwear, fleece, and accessories. Their products are designed for climbers, mountaineers, polar explorers and hikers.
PHD was established in 1998 in Stalybridge, Greater Manchester, England by Peter Hutchinson, the founder of Mountain Equipment, and designer and manufacturer of a range of mountaineering and polar expeditions for many decades. PHD's clients include Sir Ranulph Fiennes, Rosie Swale-Pope, Kenton Cool, Adele Pennington, Andy Kirkpatrick, Ian Parnell and Jim McNeill. In the year 2000 their Minimus down sleeping bag was chosen as an official 'Millennium Product' by the British Design Council.