I live in So Cal and wear capri pants all year round for golf.  These are the softest knee socks to wear when the weather gets a bit chilly in the morning.  They are not to thick and keep my exposed legs warm.  The L/XL stays up on my slightly chubby knees and do not slip down or feel tight.  I don't know if the elastic at the top will stretch out but so far so good.  Since I only wear them as leg warmers I'm not sure how they would fit under boots but the are fine in my golf shoes.