I love these leg and arm warmers.  My 9m old son has worn every pair and he doesn't mind them a bit.  We went on vacation to Alaska and I put a pair on him everyday under his pants.  These didn't hike up like pants do when the baby is being held.  His legs stayed warm.  My son does have chunky thighs so after a full day of wearing these, he did have red lines on this thigh but he didn't seem to be bothered by it.  A couple of times, I did roll the top down so that the elastic part wasn't directly on his thigh and this worked well to reduce the red lines.  I highly recommend these warmers!