hey guys.. my units havent shed very very much.. but i would say that after about 3 weeks they have gradually shedded slowly to a point where i can see i only have another 3 weeks of great use untill it becomes lower of a density that im looking for.. but still very wearable. if i get a knot sealer will it make a big difference. i dont like the hairline to shed at all. and thats whats happeneing. it slowly sheds. if i could slow the shedding down by maybe half atleast id be very happy. as i only plan on wearing each system for 2 and a half months. 10 weeks for each unit