user @riocrokite made a very nice mod based on real technology called Inline Ballutes, a cross between a balloon and a parachute.  Original thread is here: https://forum.kerbalspaceprogram.com/index.php?/topic/121162-130-inline-ballutes-ib-v128-30052017/&   Inline Ballutes Slow down your rocket in an upper atmosphere. Ballute = parachute + baloon = an alternative to a heatshield. Sample usage: Duna aerocapture and aerobraking, Kerbin reentry