Help! Cotton-linen or bamboo for a summer sleep bag? Need advice!

[yingluo]

Hi everyone! I'm trying to choose a summer sleep bag for my 6-month-old and I'm completely torn between options. I'd really value hearing your real-world experiences.
I'm stuck on the fabric choice: cotton-linen blend or bamboo fibre — which one is actually more breathable and comfortable in humid, stuffy summer weather?
I'd be so grateful for any practical tips or recommendations from your own experience. It would really help this indecisive mum make a final decision! Thanks a lot in advance.

For very hot weather you can get 0.2 tog ones. Either fabric would be fine. When it’s a heatwave they can sleep without a sleeping bag

Thank you so much! That's really practical advice. I hadn't properly considered looking at the 0.2 tog rating — I'll definitely check those out.
Really appreciate you sharing this!