The tweed covers are thick and well made. The backs are stretch nylon - thin but do the job and do show signs of wearing or tearing at the seems. The covers take a little work to install and the tightening buckles are under the seat so reaching then and adjusting is the big installation chore but the fit is perfect and hard to tell there is a seat cover on the front seats. The side airbag pockets are aligned well and the cutouts for seat controls also a good fit. The only issue is the rear seat pockets attached tot he front seats for the rear passengers to use is covered-up and not usable any longer. The covers do not slide when getting in or out and are cool in the summer heat actually. I use the truck at a mine and carry 4 dirty guys and large dogs - the interior would be ruined without. Washing is easy but do not dry on hi heat - they can shrink and that would make them almost impossible to reinstall. Most mud and grease can be cleaned while the fever is on the seat itself.