Since we do not use flame retardants our PJ's are snug-fitting to meet safety standards.
We make a loose-fitting sleep & play size newborn to 6-9 months and note these items do NOT contain flame retardants.
The regulation that notes PJs without flame retardants need to be snug fitting starts at size 12 months so the loose-fitting sleep & plays are able to be loose fitting and NOT have flame retardant as they are under 9 months and 'younger,
The link to the CPSC's Children’s Sleepwear Regulations below