I am absolutely in LOVE with these baby shark sleep sacks! You can pick one up on GroopDealz for $22.99 right now. Shipping adds $4.99 for the first item and $3.00 for each additional item, and these are available in 5 colors:
This has a 100% cotton exterior and lining for maximum breathability. The soft, quilted interior is gentle on baby’s sensitive skin, and the design makes it so they can’t kick off covers and get cold during the night. You can use this in strollers and cribs too!