Unless you are a neigh Invulnerable Superhero who can laugh off bullets and knife wounds, like Kal-El or Luke Cage, I suppose you would have to wear something a little more protective than a pair of spandex tights. In the cinematic universes of DC and Marvel, the days of Superheroes wearing leotards has gone the way of the Dodo.
I guess the first character in the Superhero genre to wear some kind of tactical body armor was Tim Burton's Batman.
It was made to look like a tight fitting muscle suit, but was actually an exo-skeleton of sorts. Batman could shrug off small arms fire and survive knife wounds that Adam West's Batman suit just could not do.
Even the X-Men in their 2000 Cinematic debut, wore leather gear to offer some protection against cuts and scrapes, but they did not seem to offer much freedom of movement.
It wasn't until years later (Batman begins 2005 and again with The Dark Knight in 2008) that military tactical gear began to work its' way into the costume design of modern Superheroes.
The Dark Knight suit is a combination of Nylon and Kevlar body armor plating which allows more range of movement but still provides the protection someone without super powers would need.
Bucky Barnes, aka The Winter Soldier also wore a large amount of tactical gear
Bucky's wearing military BDU pants, a Leather Jacket with a harness for knives and as well as ammo for his pistol & grenade launcher. He's also wearing a Commando type face mask.
Marvel Heroes like Captain America and Hawkeye also employ a similar amount of Tactical Gear in their outfits.
Captain America's outfit is based on tactical gear, with the BDU (battle dress uniform) pants with knee pads, finger-less leather gloves, elbow and shoulder protection. He has a belt full of ammo pouches similar to Batman's Utility belt. Even the helmet is Kevlar with chin straps like a soldier's helmet. Altogether, his outfit appears paratrooper-like. His WWII outfit was also based on similar tactical gear.
Hawkeye's gear is practical and allows him to bend and stretch while also adding knee pads (if he shoots from a kneeling position.) He sometimes wears a long sleeve leather jacket but prefers shooting his bow with bare arms. His Quiver holds 15 mission specific arrows.
Black Widow's outfit is also made to bend and stretch and allows her to do all the acrobatic fighting she is known to do. She's also got several leg holsters and her Widow Sting wrist weapons. Her waist belt holds the rest of her gadgets and her finger-less gloves are similar to Cap's.
Let's look at Wolverine, in Days of Future Past.
Again, we see the influence of tactical gear. He is wearing a tight fitting G3 (style) Combat Shirt with a harness of protective plates. His pants are based on military type BDU's again with knee pads and heavy protective boots & gloves. It's all practical and very functional. Even though Wolverine can take all kinds of damage and heal up, he doesn't like getting hurt anymore than you or I do.
So what do you Think?