Two of these are available. We bought these for our two-year-old twins last winter, and they only wore them a handful of times before they just outgrew sleepsacks generally. These are really nice - we had the next size down and used them constantly! Description from website and link: https://www.woolino.com/products/baby-sleep-sack-4-season-merino-wool-wearable-blanket-2mo-2yrs-stars PREMIUM FABRICS FOR BEST COMFORT - The award-winning 4 Season® Ultimate Baby Sleep Bag keeps your baby at a perfect temperature throughout the night, year-round. That means there’s no need to worry about which weight sleeping sack to use, or whether your baby will be too hot or cold while sleeping. SAFER, BETTER, AND LONGER SLEEP - Made with super-soft and supremely breathable merino wool, it helps keep your baby warm when it’s cold and cool when it’s warm. That temperature regulation means that your baby will sleep comfortably throughout the night– and that means a better night's sleep for you too. Cuddly-soft organic cotton outer adds to the comfort as it's perfect for the most delicate skin. THE ONLY SLEEP BAG YOU NEED – You only need one Woolino sleep bag, right up until your baby turns two! And for toddlers, we’ve got you covered too, with a size for ages 2-4 years.