Sox Italy,&nbsp; Ghost No Show Silver Drystat Plantar Support Performance Socks - SS6011 SILVER DRYSTAT is infused with Silver, using a base material of Polypropylene which is also naturally bacteria resistant, 100% recyclable and does not contain Bisphenol A a Non Toxic quick drying material. Odor is created when bacteria comes in contact with sweat, by stopping bacteria from growing and wicking away moisture the socks will remain odor free, your feet may still smell but not these socks. 4 WAY STRETCH- Try it -pull both directions, if it is shorter in one direction that is only 2 Way Stretch. our socks stretch both directions for consistent compression throughout the entire sock, EACH PAIR is hand tested in our factory for performance, they are WASHED in a "chemical free" fabric softener with a nice fresh scent making our socks "Ready to Wear" right out of the box SIZE CHART: Small (Women's 5-8, Men's 4-7), Medium (Women's 8-10, Men's 7-9), Large (Women's 10-12, Men's 9-11), X-Large (Men's 11-14). Due to the stretchability of the sock, For more arch and plantar ligament suport choose one size down. Vitalsox factories are FDA Registered (REG#3011496736) ARCH, PLANTAR, HEEL CUP SUPPORT ZONES- extra support bands for your plantar ligaments and arch with a deep heel cup and flat toe seam. NOT A QUICK FIX, it will take many days or weeks to recover. For stubborn cases, see a podiatrist for more aggressive treatments that may be required. 100% MADE IN ITALY- SINCE 1998 Vitalsox the leader in technology and materials. Made from start to finish in our own factory never outsourced to the lowest bidder or built using machines designed for other products with inferior low priced non tested materials. performance does make a difference, GUARANTEED quality that stands out in your sock drawer, in Italy we are proud to make a superior product at a reasonable price. The Best Socks at any price.