These black and purple Salomon S/Lab XT-4 Advanced sneakers are designed for running. Complete with an Agile Chassis System that provides stability on long distance runs, this style features a round toe, lace-up fastening, tonal detailing, logos at the tongue and a moulded rubber sole. They’re constructed with durable mesh and have comfortable cushioned sides. The Sign of Four is a Sherlock Holmes novel by Arthur Conan Doyle, and these Salomon S/Lab XT-4 trainers are the missing elements to solve the riddle of any outfit.