Sierra Designs Lightning XT 3 Three-Person Ultralight Tent 3-person, 4-season ultralight 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 42 square feet of sleeping space; 15.5 + 8 square foot vestibule area Measures 92 x 49 x 95 inches (W x H x D); trail weight of 5 pounds 10 ounces