Every time there’s a new movie, Captain America’s uniform goes through changes. That’s true for any superhero, actually. For Winter Soldier, his costume was toned down a little and the stripes in the middle were removed. Replica Props Forum user HenryTJO11 finished a replica of the costume in March, and he did an amazing job making it look just like the one in the film. The helmet was made using a base of Pepakura, and he used a plastic shield that he ended up reinforcing with metal rings. He broke down the stealth uniform as follows:

With the suit we decided it’s a 2 piece (jacket and trousers) with the jacket being slightly longer so it can tuck into the trousers. We also decided that the jacket is in 3 pieces. The shoulders that go round the neck and rest on the shoulders with a strap going round the bicep. The under part (darker material in the ref pics) which would be made of a more flexible and stretchy material and then the outer part (the blue part of the suit) would be a tougher material in the places that dont move (chest, back, forearms and abs) with foam inserts on the chest, abs, forearms and shoulders. He also said he would make the white/silver parts out of urethane.

He took a creative approach to keep Cap’s shield in place on his back:

For those wondering about how I hook the shield to my back, it’s quite simple. We attached a thin strip of leather to each of the handles on the back and then a tiny metal hook to the top of the back buckle thingy. The strip also gets covered by my arm when I’m holding the shield so you can’t notice it at all.

We were going to put a magnet on the middle of the shield and to the back of the buckle but this is the Disguise shield and it’s domed alot more than the movie one is so the magnets wouldn’t have been able to make contact. I am able to hook the shield onto my back myself so that’s a plus.

Read more about the build at The RPF.