I wanted to try them but was surprised that REI in Mountain View & San Jose, CA did not carry more than 1 (large) size in just 1 model. I know REI has very goo

I wanted to try them but was surprised that REI in Mountain View & San Jose, CA did not carry more than 1 (large) size in just 1 model. I know REI has very good return policy and encourages me to just order online & return if don't like. But still, I feel like wanting to try them on and see if I like them or not and which model is best.