I bought this pad because our horse has sensitive shoulders & I liked the different insert options available. Most of my friends use Thin line but I didn't like the options available. We bought the sheepskin and the pro impact inserts. It works great!! No sore shoulders so virtually no behavior probs. After riding you can see the insert shape on his body. The pad we use underneath is soaking EET but the half pad stays virtually dry! O e thin I must say is that you really should use the schooling liner with this pad to prevent slipping and to ensure that the half pad doesn't hang over your all purpose pad as the liner comes in sizes and is made to fit this pad. I love that I can change inserts based on what he needs....this has saved me from massage therapy!!!