2FLY Men’s Boxer Briefs Multipack Ultra Soft, Active Stretch Underwear

I’m not sure I have a more perfect set of underwear in my collection at this point. These underwear are in a boxer style (my favorite), and they come in a nice pack of 4 (yes, the copy says 3, but – fortunately – that’s wrong!) I’m not sure exactly what the fabric is, but it’s exactly as the ad copy said – ultra soft “stretch fabric” (whatever that means). I can only assume that these, like many other performance clothing, it’s some mix of polyester and something stretchy, but they don’t specify, so I can’t say for sure.With that being said, these are flexible, super comfy, they equal out to about $5 a pop, so they’re not bad in the value department, either. For a person whose weight tends to fluctuate, these are perfect! I really like these and plan to purchase another pack! These are truly performance underwear!