In a perfect world, I’m partial to alpaca or bamboo yarns that are super soft, they really are the best yarn for baby blankets. But they can also be super SUPER expensive. And while I do want the softest yarn for baby blankets possible, babies wear things and use things for such a short time. What is the Best and Softest Yarn to Buy For Baby Blankets? Red Heart Soft. This yarn is soft and of premium quality. A super bulky yarn spun from 100% premium acrylic that is heavenly soft on baby’s skin. Lion Brand Baby Soft. Caron Simply Soft. Plymouth Dreambaby. Sirdar Snuggly. Berroco Comfort DK. It isn’t quite as soft as some of the other baby yarns, but among 100% acrylic yarns it’s pretty good. Machine washable and dryable. Universal Yarn Bella Cheniellei – Super soft and snuggly. This yarn falls somewhere between worsted weight and bulky. Made for baby projects, this yarn is perfect to knit a baby blanket! It is made out of 100% acrylic. For the best baby blanket yarn for sale that’s chunky and soft, check out Bernat Baby Blanket Yarn. It’s weight category 6 which is called super bulky. And super. This yarn is 100% polyester and is sturdy enough to . it is exceptionally soft and perfect for a baby’s soft, Not just baby blankets…if you plan to crochet any other item that will be worn by your baby, you should stick to the soft and delicate yarns—like. The softest yarn for baby blankets. 4 Replies. Today on Ravelry someone confessed that they were sick and tired of scratchy acrylic and yarns. Find adorably soft, cuddly yarn created especially for baby: perfect for tiny booties, bonnets and baby blankets in a range of gentle shades.