Schooling Boots

Looking into purchasing a pair of schooling boots for my little guy. I really want to get something that won’t slip. I’ve ridden several horses across my career who use schooling boots, and the boots that they used constantly fell off due to build up of dirt/sand when it was muddy. (most we’re wearing neoprene/velcro splint boots)

What do you guys think of the ThinLine Sport Boots: http://www.thinlineglobal.com/shop/#!/~/product/category=5515836&id=23455556

They look durable and like they will hold up in muddy conditions, but I wanted to get a second opinion.