Using Tony and Shuris nanosuit technology as a reference, as well as Rocket's energy flight suit, the nanosuit which Luke personally made was still divided into an inner and outer suit.
The inner suit was as low-key as ever; it basically appeared on Luke's family and friends as a tank top, shorts, socks or some other item of clothing.
When taking a shower or going to the toilet, the nanomaterial could pull back and turn into a necklace or a bracelet to provide 24/7 protection.
It had the Black Panther suit's ability to absorb and release energy to eliminate the threat of ordinary cold weapons and firearms.
It also had the protective measures of Rocket's energy shield, such as defense, temperature regulation and life support.
The outer suit basically used Tony's nanosuit technology. The difference was that Luke used several times the amount of nanomaterial to create a double-layered heavy duty suit.