I thought with starting end of May and ending in July a Thermolite Reactor silk Liner was going to be plenty. It's thin like a normal silk liner but has some technology that is supposed to heat up more than a normal one. I have no experience in these liners so I don't know what to expect. I just know it's really small. I've been watching temperatures and they seem low not to mention the rain everyone is speaking of. Am I going to freeze at night? Shall I re-think this and go with a fleece liner. I went with a small pack so i'd prefer to avoid the whole sleeping bag thing.