It's a fun blog. Many references I have not seen elsewhere.
Many pressure suits have "Baggy butts". This is because they are cut / patterned for sitting in a cockpit, not for standing, and you need extra rise (distance from crotch to shoulder) for sitting. Pressure suits can't stretch, they have to be made from non-stretch material, so this extra material bags when standing.
I built prototype suits for SpaceX and Elon wanted the suit to look "Bad Ass!" (His words, in our contract.) Due to this sitting issue, the prototype had a baggy butt. One of the notes from Elon, is he thought the suits butt was not attractive. During our review meeting, I pointed out to Garret Reisman (astronaut in charge of development) that I felt we met the contract, as we had made a suit with a "Bad Ass".
Also, like the Windak suit, many pressure suits have a zipper that runs from the nape of the neck, through the crotch to the bellybutton. This is to allow you to get into the suit, given the helmet disconnect needs to be in a fixed position. The Mark IV and mercury suits has multiple zippers, including a spiral zipper around the waist. The Apollo A7Lb has one around the waist, and one from waist to collarbone.
I know that at least one of the Windak suits is in a friends collection (he may have more than one), but I too have been curious where the rest of them ended up.