Hi guys, in one week ima heading on 10 days hiking and camping troguh Sörmlandsleden to Stockholm from small place called Gnesta. My question is about sleeping bag. I know how is it when you freeze trough night in tent and i dont want this to happen ever again. I bought foam matress with R value in decathlon and also have self inflating matress so those 2 should keep cold from the ground very well from my body. My sleeping bag is some random brand called Kander hebog 200, and its comfort is 7.8°C as it says, and its under en13537 standard. I will also buy liner in decathlon and will wear dey warm clothes and put bottle with hot water inside so it keeps temperature. Should I buy more expensive and warmer sleeping bag that has comfort -4°C, or am I good with this stuff?