You will not regret it. Some real experienced guys like the 3D better then the 4D and they are less expensive. I only have experience with the 4D. In dealing with the 4D they have size ranges like L - 29.9"-33.9. My waiste measures 39" and I have the L which fits me perfectly. So I got shorts which are 4.1" smaller then the maximum range on the size chart then my actual waiste measurement. Keep this in mind. The shorts have to fit tight to work. Using this go on Amazon Prime and order the absolute smallest shorts you think you can fit into and the next size up. Send back the one you don't want free with Prime.If you want to be adventuress, you could do this with the 3D and the 4D. You are going to love them. I have found the compression actually increases the more you wear them and wash them. Post something up when you sort it out. Good Company,I want to support them.