For jogging The ideal: a fine sock, without seams, to avoid any friction. Elastic, she marries the shape of the foot and does not shoot. Its breathable fibers allow good ventilation. Professional advice: choose socks with right / left feet, inner loop, to have the right thickness at the points of support of the foot. PK Court, Go Sport, 9,99 €.

For hiking Ideal: Two knitted socks on one another to dampen the mechanical friction of the foot while walking. They are chosen thermocool, a fiber that absorbs the equivalent of a glass of water that transpires each foot during a day of hiking. Pro tip: you are more comfortable in narrow socks. Climasocks XCR, Rywan, 9,90 €.

For the bike The ideal: polyester "second skin" socks. They have a plush loop on the toes and heels to compensate for the impact of pedaling. Board of pro: one favors the clear colors, more refreshing. AdiStar S-lite socks, Adidas, € 11.

For riding Ideal: knitted knee highs with elastic bands at the arch and ankles to cushion the friction of the foot on the stirrup. Polyester fibers (thermolite) are preferred, they keep feet warm. Pro tip: In winter, you wear 100% silk ultra-insulating knee socks before putting on your socks. High socks, Rywan, 19,50 €. Hot socks, Fouganza at Decathlon, 9,90 €.