Do I need to wear something under my leggings or shorts?

It's totally up to you whether you'd like to wear something under or not. We honestly have people wear the leggings and shorts both ways- with underwear or bikini bottoms under, or without. They're 100% opaque, so no issues with sheerness, and the fabric is antimicrobial and moisture wicking. Do what will make you feel the most comfortable in the gear!