ALPS Mountaineering Camp & Hike Acropolis 4-Person Tent Gray/Navy 5422350. The design of the sturdy aluminum poles provides an ideal living space with near-vertical walls. With mesh walls air will easily flow in and out of the tent when the fly is not needed. When conditions change the full coverage fly and two large vestibules will keep you and your gear protected and dry. The Acropolis will be your go-to tent for all of your outdoor adventures.