Chapter Two, The Breath, discusses breathing, breath support, relaxation, air compression, blowing exercises, the diaphragm, the lungs, inhaling and exhaling air, circular breathing, the relaxed throat, the glottis, warm-up exercises and excessive tension.
Really low sagging, like practically with your pants at your kneecaps is not in style right now, but sagging to show a little underwear, or the more PC term low rise is still in. Sagging is purely a thug influenced thing, dudes do this look like wannabe thugs that lost their belts in prison. I won't even lie.
The primary difference between the two, is that straight leg jeans are straight right through, whereas the bottom is flared out in bootcut jeans. Straight leg jeans can be worn high at the waist or low at the waist, and would mostly be straight at the thigh, which means that they are not the clinging types.