The Oslo Sport has a PU moulded support frame for superior breathability and durability and is made out of breathable Aerpluss microfibre. They have a Vibram outsole, which is resistant up to 300 Deg C short term hot contact, which feature a rubber core, for slip resistance and a TPU frame for durability. The shoe has a WED Wire Electricity Discharge Strobel sole, which allows the shoe to maintain its antistatic properties even when the insole is removed or replaced. They also come with light-weight and flexible Enigma Zero(k) composite nail penetration protection and toe protection. They come with a Dualmicro heel insert for durability. The Helly Hansen 78210 features: Aerpluss 3D BZBI Microfibre Upper, Hydrotech water-repellent coating, chemical resistant threads, breathable mesh lining, metal free. S3 HRO SRC rated.See all Oslo products here