ChampionMen's Sweatpants, Powerblend, Fleece, Open-bottom Sweatpants (Reg. Or Big & Tall)

Whats the inseam on large?

Looking for comfortable pants for my 91 year old dad. He weighs 210 and needs a 28 - 29 inseam. Will an Xlg fit him?

What’s the open bottom mean? Are they similar to Champion?

I wear pants 38-36 6’7 tall what size would be best ?