I've been wearing the Arc'Teryx knee pads since the beginning and love them. You can wear them under or over pants easily. They are so low profile people will not notice they are under your trouser legs. They do not hold moisture, so no soggy smelly knee pads! The design on the lower strap is not to grab your leg, but to sit on top of your calf muscle so only the top strap actually grabs you. They are crazy comfy. If you crawl in the prone for a living there might be better choices, but for most tactical work they rule.