Learn Spanish (Latin America): Por muy flojo que esté el tejido, el diseño es hermoso. - No matter how loose the knitting is, the design is beautiful.

The formula por muy + adjective + que is a common way to express "no matter how [adjective]" or "however [adjective]". Here, plugging the adjective flojo into this structure creates a concession—acknowledging a potential flaw (the looseness) before stating that the design is still beautiful anyway.

Why is esté in the subjunctive here?

In the por muy ... que structure, we use the subjunctive when the information is treated as a possibility, a hypothetical, or a shared fact that isn't the main point of the sentence. By using esté, the speaker is saying "even assuming the knitting is loose" or "despite the fact we both know it's loose," which keeps the listener's focus on the second half of the sentence: the beautiful design.

Why do we use estar for the knitting being loose (esté) but ser for the design being beautiful (es)?

We use estar with flojo because the looseness of the knitting is a physical state or condition (perhaps the creator just knit it too loosely). We use ser with hermoso because being beautiful is an inherent, defining characteristic of the design itself.

Doesn't flojo usually mean "lazy"?