The Sako's air-filled beams are made of a sail-like cloth, which restrains an inner bladder, increasing air pressure and, thus, rigidity (the tough shell offers protects against sharp objects). The waterproof, three-man tent inflates in 45 seconds with a soft, four-ounce foot pump. $500
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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