swaddling

Jenna
What can I do about my little one breaking out of his swaddle every night. He loves his arms free now. Should I just stop swaddling? He's 8 weeks old. Right now he wears a onesie and then I swaddle him. But when his arms get free his hands are so cold. Was wondering if I should just put him in footie pjs.. I live in Vegas so it's just starting to get cool at night