The Baby Tuck Sheet is a TOG-rated, safe newborn bed sheet - a baby blanket alternative - suitable from birth. Designed to use over the top of a swaddle or sleeping bag, the Baby Tuck Sheet is a firm-fitting mattress sleeve that provides added security and comfort for a newborn during sleep. Each side of the Baby Tuck Sheet is TOG-rated; simply flip the sheet over to adjust the warmth and follow our Bedding Temperature guide (included) for help layering. The zips allow you to adjust to two levels of firmness (tightness), to find the perfect fit for your baby's size, or strength of startle reflex. The Baby Tuck Sheet has been stringently tested and approved as safe by leading independent infant safety organisation INPAA. When using the right size for your baby's length and sleep environment, the Baby Tuck Sheet will not come up higher than mid-way up baby's chest following Red Nose safe sleep guidelines. Given the design of the product, the Baby Tuck Sheet cannot become untucked from the mattress, be pulled up near baby's face, or be classified as loose bedding in any way. If your baby does manage to get their legs out of the Tuck Sheet, our newborn bed sheet will simply lie flat on the mattress. Newborns who don't like to be swaddled may find the firmness of the Tuck Sheet comforting in lieu of sleeping with their arms in. Please do not use the Baby Tuck Sheet once your baby shows signs of rolling over. SIZING: Bassinet: Height 45 cm, Width 44 cm. Cot / Crib: Height 63 cm, Width 73 cm. Our products are reviewed by the Eczema Association of Australasia as being skin-friendly. All ergoPouch fabrics are dyed with non-toxic water based dyes, and come in trend-driven prints and colours to suit any nursery. All our prints are designed in-house.