CREATE TABLE table_44508 ("Year" TEXT, "Supplier" TEXT, "Chest" TEXT, "Sleeves" TEXT, "Back" TEXT)

Which Back has a Supplier of Kooga and a Year of 2006-2008?
SELECT "Back" FROM table_44508 WHERE "Supplier" = 'kooga' AND "Year" = '2006-2008'
SELECT "Back" FROM "table_44508" WHERE "Supplier" = 'kooga' AND "Year" = '2006-2008'