Ongoing material changeover to recycled polyester in progress, breathable, padded under the lacing and on the schaft, energy absorption heel, replacement insole, SRA anti-slip, moisture-regulating lining, oil resistant, very lightweight, certified according to EN ISO 20345:2022 SB FO SR. Surface: polyester "Flyknit" mesh lining, suede trim, sole: PU with double density, protective cap: steel