FreshIQ advanced odor protection technology attacks the odor-causing bacteria in your clothing that causes your underwear and socks to smell — so now you can feel fresh all day. ComfortSoft fabric is T-shirt soft. Generous cut lets you move with ease. Tag-free for itch-free comfort. Comfort Flex waistband is soft, stretchable and wider than our traditional waistband. Sturdy, long-lasting double-stitched seams. One-button fly will not gap.