The blend pairs Drynamix recycled polyester with nylon and elastane. Balega describes Drynamix as sweat-wicking: that is the moisture-management part of the design, separate from the silver treatment. This is a synthetic activity sock.
Balega says silver ions are incorporated into the yarn. A laboratory silver-ion study observed changes in bacterial membranes, suggesting a possible antibacterial pathway; that solution experiment did not test this sock or reproduce conditions inside a shoe.
A seamless toe limits seam bulk. The deep heel pocket, raised tab and arch-hugging knit are intended to keep the sock seated; cushioning adds material underfoot. These are concrete reasons to consider it when movement inside your running shoe bothers you.
Expect a cushioned, close-fitting running sock rather than a thin liner. No product-specific quantitative antibacterial result is provided here, so choose it for its fit and construction rather than a promised level of odor reduction.
Choose it for a secure no-show fit with deliberate heel and arch construction. Look elsewhere if you prefer loose socks, minimal padding or crew coverage; those preferences matter more than choosing by silver alone.