Caterpillar's Attention boots can take a beating from the elements and still remain as comfortable and durable as ever. As well as watertight seals and specially treated impermeable leather these boots carry the responsive FlexFWD technology which makes them some of the most tough and hardwearing boots around., FlexFWD is flexible durable and lightweight. Durable and lighweight EVA midsole., Waterproof features keep water out and feet dry. FlexFWD outsole for durable superior flex., EASE footbed for lightweight comfort. Cement Construction.