The original purpose of this blanket was to of course stay cool at night. It definitely does that. My boyfriend is a sweater at night and has to take the blanket off him halfway through the night. Bought this for him and he tested it for about a half hour and it did its job. The true test was for the whole night, he used it at night for a whole week and not once did he get uncomfortable when using this at night. He enjoys it quite a bit. This was used even with the heat on at 75° for the heat in the house and he was cold. My husky happened to lay on it once and he enjoyed the time he was on it before I had to confiscate it from him. As an fyi per my generator of a boyfriend, if you use another blanket on top it will trap the body heat in. The matte looking side is the side for skin contact to keep you cool while the shiny esque looking side is what you keep off you otherwise it won’t do its job properly. So not only does my boyfriend like it, my husky likes it.