These boots, designed to be used with open heel fins, are made of soft nylon-lined neoprene 5 mm, ideal for cooler waters. Reinforced pu protection for instep and heel provides resistance against wear and tear. The notch for holding fin strap is integrated into the heel. A practical ykk zipper opens at the ankle for easy donning. Water seepage is reduced to the minimum thanks to a protective thin flap hydro seal under zip. The cressi personalized ankle strap has a velcro in the inner part. A rigid, non-slip and hi-grip moulding covers the entire sole