[8] The Galaxy Z Flip is constructed with an aluminum frame, and 30 μm (0.0012 in)-thick "ultra-thin glass" with a plastic layer similar to the Galaxy Fold, manufactured by Samsung with materials from Schott AG, which is "produced using an intensifying process to enhance its flexibility and durability", and injected with a "special material up to an undisclosed depth to achieve a consistent hardness"; conventional Gorilla Glass is used for the back panels.

The Z Flip is also available in a Limited Edition Thom Browne model, featuring a red, white, and blue stripe on a gray base.

Dolcourt called Flex Mode "the most unique, interesting and effective feature by far", while noting that battery life was just average and most multimedia was incompatible with the device's aspect ratio, resulting in pillarboxing.

[14] Chris Velazco of Engadget gave it a 78, praising the form factor, performance and cameras while criticizing the cover display and overall fragility.

[15][16] Dieter Bohn of The Verge gave the Z Flip a 6/10, concluding that "as with previous folding phones it is more of an expensive experiment than a real product anybody should buy".

Bohn praised the performance and hinge design, but was critical of the price and cameras, noting that the screen’s plastic covering was still susceptible to scratches.

[17] Samuel Gibbs of The Guardian praised the phone's durability, reporting that "the screen looks and works just as great today as it did fresh out of the box" despite being unfolded several dozen times each day for four months.