At the core of all Kneelo® knee pads lies a deep layer of shock absorbing EVA foam and a luxurious cushioning layer of memory foam. It is encased in waterproof, durable neoprene with a quick dry, wipe clean, nylon coating. Unique, registered, design, together with soft elastic material, offers incredible wearer comfort with no digging-in either at the back of the legs when kneeling or uncomfortable pressure at the front when standing. They have adjustable 'Hook & Loop' straps - one size fits all.