Panniers These are not Leather so wont srink or small after a couple days in wet. TEK leather is a high durability, leather-like material. TEK Leather is designed specifically for the outdoors and for automotive applications, with a high level of utilization and element resistance. TEK Leather can only be distinguished from real leather by touch and smell, never by appearance. Black Synthetic Leather Saddle Bag Pannier Luggage. Saddle Bag In TEK Leather. Saddle bag and Trimmings in TEK Leather. Super Quality, Water resistant and Strong Construction Easy Carry Handle. Please check the ...