A three year challenge to recreate the equipment used by Mallory and Irvine in their ill fated attempt to climb Everest in the 1920s revealed that they were adequately clothed, wearing an unbelievable number of layers, as shown in this list. Today, the number of layers has changed as have nearly all the materials used for Everest kit, with high tech, breathable yet waterproof fabrics and lightweight alloys. The extreme requirements of Everest are a good way to demonstrate technology and design innovation through history.

A list of unusual snow vehicles, from Sno Cats and bizarre Russian snow cars to the amazing antarctic snow cruiser which is powered by a aircraft which is literally bolted to its roof. Unlike regular snowmobiles, these vehicles shuttle groups of people around the barren wastelands of places like the antarctic.

Suits for hazardous materials are serious business and high tech., but look ridiculous. They come in several varieties: Splash Suit, Gas Suit, Turnout Coat for different levels of contamination. Their look ranges from giant pink translucent condom like outfits, to oversize Tasmanian Devil shaped suits. From the examples in this list, standard training procedures include washing down while standing in a regular inflatable kids paddling pool and basketball dribbling.

What are the essential gadgets to carry around every day? The first in a series where various people describe their current or ideal stash. Today its Oobject's turn. Vote to rank our choices.