Free Shipping. Black Diamond Tripod Bivy The Tripod by Black Diamond is a larger, more spacious incarnation of the bivy sack made of ToddTex for total stormproofness. Three-pole design. Seam taped. Dimensions: 221 cm x 89 cm (92” x 30”) Weight: Bivy and Poles: 1.18 kg (2 lb 10 oz) Packaged: 1.35 kg (2 lb) Packed Size: 15 cm x 38 cm (6” x 15”)