So I just started nap training my 3 month old LO & ditched the miracle blanket cold turkey as well. She's doing really well, but noticed her arms/hands were a little cold when she wakes up (she sucks her fists to self-soothe). I've been putting her in a short-sleeved onesie & footed pants, plus the Halo cotton sleep sack. We keep our apt at 72 deg and she's comfortable in just a short-sleeved onesie when awake & playing.

Does your LO wear something different for naps vs nighttime in a sleep sack?