These bivvy boots are made from soft neoprene which stretches and is totally waterproof. They have taped seams and are available lined with fleece or unlined. We have designed a unique dipping process which applies a thin rubber sole to the boot which stops you slipping on wet grass but is very flexible and so thin you won't know it's there! Designed to be worn in bed to keep you warm yet straight out into the wet (even in the water) to net your fish - then straight back into bed. Totally unique!