There are single layer and double layer sleeping bags for you to choose:
0.5 TOG-single layered, suitable for room temperature above 24 C.
1.0 TOG-double layered, suitable for room temperature from 21 to 23 C.
Good thickness for air conditioned home in summer and spring.
If in winter, this 100% cotton sack can be layered with warmer sleepwear or wear more pajamas inside.