Is this wig really glueless?

Yes. It is built for a glueless install, so no adhesive is needed to hold it. Fit depends on the adjustable straps and combs inside the cap.

What does the 7x5 lace size mean?

The lace closure measures 7 by 5 inches, which gives a deeper parting area than the common 4x4 closure. That allows a side part set further back.

Can I color or heat-style it?

It is human hair, so it can be heat-styled and colored. Go to a professional for color, and use heat protection to keep the body wave intact.

How does it compare with a 4x4 glueless wig?

The 7x5 closure offers more parting space and a more flexible part line. A 4x4 is lighter and usually less expensive, but limits where you can part it.

How should I care for the HD lace?

Handle the lace gently when installing and removing, and avoid pulling on the hairline. Wash with sulfate-free products and detangle from the ends up.