Lorpen Walking Coolmax fx Silk Lined Socks,Tangerine,Medium 50% Coolmax fresh fx/25% silk/ 15% Nylon/ 10% Lycra Imported Instep cross brace. X marks the spot of our Lycra cross brace that hugs the sock to the top of your foot, ensuring a very sensitive area remains wrinkle free. Instep cross brace. X marks the spot of our Lycra cross brace that hugs the sock to the top of your foot, ensuring a very sensitive area remains wrinkle free.|10% of the overall yarn content is knit with real Lycra yarn from Invista.|Flat knit toe seam: its expensive to make toe seams with this special stitch, but we think it delivers a superior seam that is virtually impossible to feel.|Women's specific fit of narrower heel and forefoot combined with lower overall volume keep it snug and in place all day long.|