It doesn't matter what the garment is (jumper, sweater, fleece, whatever) it matters what the fabric is and how high quality the fabric is.

One of the big factors that makes a fabric high quality is strand length and longer strands are more resistant to pilling.

This company markets merino jumpers it claims are "made for life": https://www.asket.com/gb/mens/knitwear/merino-sweater-light-grey