Sierra Designs Wild Bill 20

Regular Long X-Long Weight 3 lb 9 oz / 1600 g 3 lb 12 oz / 1700 g 4 lb 0 oz / 1800 g Fill Weight 2 lb 3 oz / 990 g 2 lb 5 oz / 1000 g 2 lb 8 oz / 1100 g Temperature Rating 20° F / – 7° C 20° F / – 7° C 20° F / – 7° C EN Comfort 34° F / 1° C 34° F / 1° C 34° F / 1° C EN Lower Limit 25° F / – 4° C 25° F / – 4° C 25° F / – 4° C EN Extreme – 6° F / – 21° C – 6° F / – 21° C – 6° F / – 21° C Fill HeatSync Synthetic HeatSync Synthetic HeatSync Synthetic Shape Mummy Mummy Mummy Max User Height 6 ft / 180 cm 6 ft 6 in / 200 cm 7 ft 0 in / 210 cm Shoulder Girth 62 in / 157 cm 64 in / 160 cm 68 in / 170 cm Hip Girth 58 in / 147 cm 60 in / 150 cm 66 in / 170 cm Foot Girth 40 in / 100 cm 42 in / 110 cm 46 in / 120 cm