Conforms to EN ISO 20345:2011 S3 WR HRO SRC. The ultimate in performance. Footbed One has been developed using PU anti-fatigue matting designed for wearers that require the highest shock absorption properties. Footbed Two provides increased ankle stability and arch support, ideal for working on uneven ground and terrain. Ultra breathable and moisture wicking lining. 100% waterproof construction. High abrasion resistant properties.