We love this sporty, affordable packer harness. The elastic strap fits snugly under your underwear but is stretchy enough to still be comfortable. Compatible with most types of soft packers. It's a great option for people who want to pack every day, but don't own (or don't want to own) an entire drawer of packer underwear.  SIZING:  Small 28-31" waist Medium 32-35" waist Large 36-40" waist XL 41-45" waist It should be noted that this product gives your packer a "lift" and can slightly enhance the appearance of your packer's size.