The "Big 4"

WeightWeight (Metric)
Osprey Ariel 654 lb 14 oz2200 g
Big Agnes Copper Spur UL 2 mtnGLO2 lb 14 oz1300 g
REI Air Rail 1.51 lb 9 oz710 g
Klymit KSB 20°2 lb 12 oz1250 g