Built-in hoods with built-in (or added under) gags always turn me on. You can’t remove the gag and or the blindfolds without removing the suit first. And the seal between the hood and the suit is hermetical. No skin visible, no leak possible. Wear a collar or neck corset to enhance this effect ;-)
Built-in leggings or tights will prevent sticking your hands/arms out through the leg openings even if you escaped the “strait-jacket position”. Or better add a waist belt to completely immobilize the arms (see Part II).
But I would like to concentrate on how to inflate/deflate the suits while playing alone. This is what Lars from Sadomechanix (make sure you have visited the site!) sent me: