The Black Diamond Spotlight bivy is designed for the gram-counting minimalist who values some added comfort. Black Diamond . Made from highly packable NanoShield fabric for weather protection and breathability. Single DAC Featherlite pole provides extra room over the head and shoulders. It has a large zippered entry and a. Large mesh panel door with an awning for excellent ventilation. Bivy size: 30 x 92 in.. Area: 18.5 sq. ft..