If I was to buy an under quilt that goes to zero degrees. Could I vent it when it warmed up to around 50 degrees and remain comfortable ? IF i get a little cold when I'm trying to sleep I will be up all night. And could I remove my top quilt to cool down a little?. Is this a practical way of thinking? I'm just afraid if I don't get the warmest UQ I will regret it. So I figured I could adjust it to fit the need . Any and all feed back is appreciated.