The Exped SynMat 7 is an insulated air construction sleeping pad that is quite comfortable. This was one of our favorite pads to sleep on and gave us many good nights of sleep. It also has an internal pump, which is a nifty feature though most testers found it unnecessary. However, the benefits of this pad are offset by its heavy weight. For general backpacking trips, our testers preferred higher scoring lightweight pads like the Q-Core SLX. Both of these pads are nearly as warm as the SynMat but weigh a lot less.
If saving weight is one of your top priorities, go for the Therm-a-Rest NeoAir XLite, the ultimate ultralight sleeping pad that shaves weight without reducing comfort or sacrificing too much warmth. For multi-day winter trips, opt for the impressively warm and remarkably light Therm-a-Rest NeoAir XTherm.