My 10 month old runs hot. This is the best sleep sack to keep her cool and comfy at night.the bamboo is nice and smooth and washes well.This is such a soft, lightweight sleeper. Perfect for summer. The length is great for my growing 1 year old.We love this sleep sack. It is made with smooth bamboo fabric which helps my baby regulate his temperature better. He always seems hot and this fabric breathes and helps him not overheat. It is two layers of bamboo fabric with no filling in between, so probably between 0.5-1.0 tog. The length is very long at 35 inches. My baby is currently 12 months, 25.5 pounds, and 30.25 inches tall. I’d say if he was any smaller, this sack would be too big for him now. The zipper is 2 way which is great for diaper changes. The zipper also has a zipper guard so you can’t feel the zipper on the inside of the sack. We love the neutral color too. Overall loving this sack and we will get a lot of use out of it. Highly recommend it!This is an exceptionally soft but not overly thick or fluffy sleep sack. The material is incredibly soft, but not a microfleece. They achieved this by use of bamboo and rayon fibers and I have to say I'm impressed with the feel of the material. It's luxurious and wonderfully comfortable. This is already loved and I can recommend it as an excellent option, for softness. The zipper is good and it opens as it should for ease of use. Good luck in your search.Can I just tell you how amazing this sleep sack is?! First of all the fabric is so silky soft and it feels soothing on the skin. It’s the perfect weight for all year round. I just put long sleeve pjs on my baby in the colder months and short sleeve in the summer but the sleep sack remains. The fabric piece covering the top zipper keeps my baby from chewing on it and I love the second bottom zipper...makes for easy diaper changes. Also, THANK YOU for making this tagless. I love that there is no tag sticking out...no irritation at all. You literally thought of everything when you designed this. It gives me complete peace of mind knowing that my baby is sleeping in the safest sleep sack made from quality materials.