The foam is not firm.

Not sturdy at all this foam stairs cannot withstand weight. It wobbles when my dog uses it causing my dog to fall. My beagle is 38lbs. This product is for a dog under 25lbs. I really wish the description would have said something about weight restrictions. It’s a very cute product, but it is extremely expensive because it’s not functional for my dog and it’s so bulky. 

This is top-quality for a top dog!!

Do not recommend this brand. Dog is 24lb and 12 years old when we got the larger ones. She has used stairs since 2-3 years of age. These always flip. Not sturdy. No weight to it. Very dangerous disappointed . Dangerous

Very nice for high places to climb!