Pack of 5 Mixed contains 2 x Medium, 2 x Large, 1 x Extra Large
Pack of 8 Mixed contains 3 x Medium, 3 x Large, 2 x Extra Large
Simply open the bag, place your possessions inside and close the twin seal by hand and secure by using the sliding clip. Then remove the valve cover, place the hand attachment of the vacuum cleaner over the valve and extract the air, pressing the bag will assist the process. Should the bags allow air to re-enter, then the sealing process has probably been faulty, open the bag, reseal, and vac the air out again.