I purchased a full set of AVS VENT SHADES (4 piece ) for my 98 S10 Blazer and they work great so I ordered a full set ( 4 piece ) for my 2011 HHR....... This set is the IN CHANNEL set which gives the car a more unique and sleeker look.... I was skeptical at first because I was concerned about being able to wipe the outer glass without letting the window down and surprisingly I%X92m able to get my hand under the vent shade and my hand are XL!! again...... FUNCTIONAL!!!!!