If you are to choose for the silk sleeping bag liner, you should know the two types of sleeping bag liner; Mummy and Rectangle.
A mummy will be smaller in size when rolled up and is a snug fit to sleep in. Personally I like to opt for the rectangle sleeping bag liner design as it gives you more leg room and for someone who moves around a lot I prefer it! Just note that if you’re also going to be using a sleeping bag liner in conjunction with a sleeping bag then you need to match the liner with the sleeping bag. A rectangle liner in a mummy sleeping bag will have you getting your feet tangled up. A rectangle silk sleeping bag liner on its own for a warm climate is what we would recommend.
A silk sleeping bag liner is much better than other fabric liner against your skin, and will also give you a soft and breathable warmth and insulation while you’re sleeping.