The Kelty VariCom Delta 30 is a mummy-shaped synthetic sleeping bag with a limit temperature of -1°C (around 30°F) and a total weight of 1389 g, offered in Regular and Long lengths. Its distinguishing feature is the ESA hood — a design that leaves the ears uncovered rather than wrapping them in insulation, which some sleepers prefer for hearing camp noise or simply not liking fabric pressed against their ears overnight.
As a limit rating, -1°C is the point at which an average sleeper stays just warm enough rather than comfortable, so it's better read as a cold-weather floor than a target temperature. With synthetic fill and a mummy cut, it sits between the bulk of Kelty's rectangular car-camping bags and the weight savings of down — a reasonable choice for backpackers who want a mummy bag's thermal efficiency without down's cost and moisture sensitivity, for trips where temperatures stay a few degrees either side of freezing.