You’ve likely heard of weighted blankets, but have you heard of weighted sleep sacks for infants?

Just like the adult versions, weighted sleep sacks promote infant relaxation, decrease stress levels, and mimic the gentle hug of a parent. All of this is important because it can lead to better sleep, which is what every new parent desperately needs.

While there are large-scale distributors of sacks already (this one brings in just shy of $5m/mo. on Amazon, per Jungle Scout), they’re mostly generic — and the market is still young enough for entrepreneurs to stand out by niching down.