Extraordinarily pure of line, this valise/luggage series by German goldsmith Saskia Diez and industrial designer husband, Stefan, can weather not just foul weather, but all the wear-and-tear of travel, even though it consists only of paper. The austerely simple Papier bags, which earned the couple the country’s 2010 Design Prize, are made of recyclable, featherweight Tyvek, a robustly synthetic paper produced by Dupont that has preserved the contents of many a postal envelope since it doesn’t tear or dissolve in wet conditions. The Diezes exposed the zippers and silkscreen-printed the bags’ surfaces in black, blue or grey, rendering every crumple eloquent. Both designers tend to mine their extraordinary clarity of material and form (usually accessories by Saskia and furniture by Stefan) from the most ordinary of details. With Papier, the pair again circles back to the presciently pared-down while the rest of us are busy overdesigning to make up for a lack of ideas.