I love this thing, its a 4in1 plyo box that allows an athlete to save space and money! I put a full product review on my blog, just click here to read it! http://stuchstrength.com/gym-equipment-reviews/staminax-adjustable-height-plyo-box-review/
This thing has a solid foam core, which is pretty awesome. I was pretty curious what the inside would look like, and it's just solid white foam. I've used it a lot and it doesn't seem to compress or anything which is cool. The vinyl could be thicker and tighter to the box itself, but that's fine. It's pretty light which makes me worry that it will slide underfoot, but I've never had a problem with it when it's been on a rubber floor surface. It gets dirty pretty easily, but it washes off really easily too.
Along with my Fortress and Kettle bell, I decided to invest in the Stamina X Adjustable Height Plyo Box. What a remarkable piece of equipment! I love the fact that I can adjust it for my workout, but it also has other uses--I also use it to hold my dumbbells when I'm doing chest exercises--so I don't have to bend all the way down to the ground to pick up 80lbs of weight. I can just grab the weight and sit right down on my bench. The quality of this piece of equipment is unparalleled and will last you a lifetime. It's a must have for anyone really seeking to change their physical shape and endurance. Joe Nipote Actor/Comedian/Author/Ring Announcer
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