From the beginning of Spider-Man's appearance in the Marvel Cinematic Universe, Iron Man took on the role of Parker's mentor, and the relationship between the two was quite deep.
Not only was Tony a mentor to Parker in life, but also provided Parker with many conveniences in combat, including designing the Spider-Man suit for him.
And Tony's Spider-Man suit will learn from his previous failures, adding many features to Parker's suit and trying his best to escort Parker.
1 Enhanced durability
One of the problems with iron man suits is durability, whether it is the first set of armor in Iron Man 1 or the armor that has been upgraded many times in Avengers 4, it is difficult not to break or suffer serious damage after resisting enemy attacks.
But the durability of the suit he designed for Parker was pretty good. In "Homecoming", Spider-Man's suit was unscathed after many battles, and later in "Avengers 3", the Iron Spider-Man suit even resisted Thanos' blow.
2 Built-in parachutes
Tony has experienced several high-altitude falls, such as in "Reunion 1", he blew up the Chitauri spaceship after the energy was exhausted, directly from outer space, "Us Team 3", he also watched his best friend Roddy be paralyzed due to an accidental crash.
So Of course Tony took this into account when designing the suit for Parker, both the Spider-Man suit and the Iron Spider-Man suit have built-in parachutes in case of emergency.
3 Heating system
In "Iron Man 3", Tony accidentally came to the icy state of Tennessee and suffered a lot of cold and freezing.
After this experience, he added a self-heating system to Parker's Spider-Man suit to avoid such a situation. In addition, he added waterproofing to Parker's suit, and I don't know if it comes from his past experience.
4 Self-charging system
In Iron Man's many combat experiences, he often faces various dangers due to insufficient energy in the armor, so he seems to have considered this problem when designing the Spider-Man suit.
Although it is not explicitly stated, the two sets of Spider-Man suits that Parker wears have not encountered this problem, and his suits also have AI systems, various built-in weapons, and equipment that need to consume electricity, so his armor is likely to have a self-charging function.
5 Functions of breathing in outer space
In Iron Man 1, when Tony rises to a certain height, the armor's system fails, perhaps giving him consideration to Spider-Man's situation in case he has to go to high altitudes or outer space.
So, in Avengers 3, Parker sticks to Thanos' ship, and as the ship continues to rise, he also feels breathless, but when Iron Man summons the Iron Spider-Man armor to Parker, Parker is immediately able to breathe smoothly, obviously this set of armor sets up the function of breathing in outer space.