Back in 2011, I purchased several NM 15-20mmHg pantyhose, after purchasing "support" hose, realizing there was no real means of support, finding slight pitting edema after a 12 hr acute care shift in my lower legs. These 15-20 hosiery have been worn every shift since for 5 years. No more edema. Still only have the one small varicose vein I had prior to donning these, at age 56. My legs and abdomen feel supported, no fatigue after a 12 hr shift. I am re-ordering now to replace a few that have tears/runs, over time and 60 wearings/washes (in the upper leg/heels areas). I love this product! Dependable and does it's job, long-term. Has held it's great value until today.