The S1 design from the Colorado-based startup, Molon Labe Seating, features three economy seats in a staggered layout, putting the middle seat slightly behind the aisle and window seats, and at a slightly lower height.
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The S1 seats won't fix everything about flying -- the seats don't recline or offer any more legroom.
https://edition.cnn.com/travel/article/airplane-middle-seat-design-trnd/index.html