Has anyone used this? Did it help baby sleep

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My son will be 4 months on the 24th and is a WIGGLER when sleeping on back at night. Constantly throws arms in air and hits face waking himself up. I’ve been using a Woombie but he’s started to roll on his side so time to stop the swaddling. I read this helps due to the light weight in chest area (feels like a palm resting on chest) has anyone used this and if so did it help your baby sleep?

I’m

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