PLEASE NOTE: Any orders received after Monday, December 16th may not arrive before December 25th. J.B. Field"s Golf Coolmax-AIR Socks® technology has the unique feature of allowing air to NATURALLY VENTILATE feet. This means your feet will stay cool and dry thanks to carefully placed air-vent panels and CoolMax®, Investa"s unique four channel fiber for total moisture management. This sock is recommended for all activities such as golf, running, and racquet sports. Designed specifically with athletes in mind features like it"s patented Natural Wicking System(specially knit Air-Panels allow air to naturally ventilate your feet keeping them cool and dry), as well as it"s Contoured Half Cushion and Impact Support Zones (for comfort and shock absorption), make it the ultimate all purpose sport sock.