Sierra Designs Lightning XT 4 Person Tent 4-person, 4-season ultralight family tent with full-coverage rainfly Innovative Tunnel Dome structure combines best elements of both tent types SuperSeal floor with taped perimeter seam for waterproof protection 57.5 square feet of sleeping space; 17.5 + 10 square foot vestibule area Measures 92 x 49 x 95 inches (W x H x D); trail weight of 6 pounds 13 ounces