very comfortable feeling material . there be 3 type of gunamuna gunapod blanket and this be the only one I have try . they other look like they might be a thicker , warmer material . this one be light -- perfect for my summer baby ! if you be look for something to use during a cold winter then this be not the sleepsack for you . the zipper be awesome . not only can you get the sleeper on baby in many different way but you can allow airflow if need . I leave the sleeper unzip in my daughter 's crib so when its time for bed or a nap I can lay she right down on the sleeper and zip she into it . this have come in handy the few time she fall asleep on I or right as I put she down . I can zip she into it without bother or wake she up . wash well . we will definitely be get more !