After A Long Distance Travel, Some Passengers May Develop Economy Class Syndrome (Deep Vein Thrombosis – Dvt). Wearing Oppo Compression Stockings And Exercising Your Legs During The Trip Improves Blood Circulation, Relieve Pain And Oedema Of Lower Limbs And Counteract The Sedentary Conditions That Can Contribute To Dvt For Male Class 1 - 18-21 Mmhg Color - Black Feature Wide Band To Prevent Slipping And Binding Reciprocated Knit Heel And Toe For Better Fit And Comfort Closed-Toe Design Progressive Compression Helps To Improve Blood Circulation Indications Improve Blood Circulation In Lower Limbs Prevent Leg Swelling, Edema And Discomfort Reduce The Risk Of Dvt During Long Distance Travel Material 75% Nylon 25% Lycra