Our soft Baby Velvet zzZipMe Sacks are made from fine plush fabric, and finished with a silky satin trim. They are high end and so soft to touch. Sleeping sacks replace loose blankets for safer sleep. Our microfiber sleeping sacks have a TOG of 1.5 and are appropriate for ambient room temperatures of 68-72 degrees F (or 20-22 degrees C). Our sacks also feature a 2-way zipper which makes it easy to place baby in the sack and diaper changes easy.