This sleepsack is perfect for my four month old daughter. Where we live in Texas, it doesn't get too hot that often. We keep the house at 68 at night, but the room she sleeps in is the warmest in the house. I put her in a long sleeve onesie without pants or socks, and she sleeps great! This sleepsack is soft, and she doesn't get too hot. I loved it so much, I bought another one in a different color.See full review