If something is snuggly, it is very comfortable and cozy, especially in a warm and soft way.
Snuggly things make people feel safe, warm, and happy.
Examples:
The blanket is so snuggly and warm.
I love my snuggly pajamas.
The cat looks very snuggly on the soft bed.
I wish I could be as snuggly as a bear in winter.
The baby is all snuggly in the soft blanket.
I feel snuggly when I'm in my bed.