CAT Charge Hiker S3 The Charge S3 is a non-metallic safety hiker with a composite toe and an SRC rated slip resistant rubber outsole. Fully Non-Metal Water Resistant ESD Safety Hiker Energy Absorbent Heel Fuel & Oil Resistant Outsole Antistatic Heat Resistant outsole to 300 Degrees Fully Non-Metal Water Resistant ESD Safety Hiker Energy Absorbent Heel Fuel & Oil Resistant Outsole Antistatic Heat Resistant outsole to 300 Degrees CAT Charge Hiker S3 Safety Boot