Anyone know where I can buy some comfortable tube socks? I needs them with very stretchy tops since my calves are fairly large. They also double for me as boot socks and I always wear two pair. I needs them long so I can pull them up just below my knees. For tennis, I push them down... as opposed to wearing them as knee socks I've tried the WalMart Hanes and they don't cut it as they're too tight at the top. Suggestions?