Slumbersac sleeping bags - the safe and comfortable way for all babies and children to sleep. Schlummersack offers a range of fantastic products, including summer sleeping bags, winter sleeping bags, travel sleeping bags, sleeping bags with feet, all of which are great value and high quality. Suitable from birth to ten years old and available in different tog sizes. The tog rating or weight of a sleep sack determines its thickness and therefore how warm it keeps your child. The higher the tog rating / weight, the warmer the sleeping bag.