This aspect of the bench affects more than comfort, in that it affects how one will be positioned on the bench and thus affected by the weights being used in resistance training. What to look for when buying an adjustable weight bench is discussed below.
Foam Density and Support
Denser foam (with a high density rating of around 1.5-2.0lbs per cubic foot or above) will maintain its shape when placed under load, thus allowing proper support to be given to your spine during press exercises.
Upholstery and Grip
Most adjustable weight benches have smooth vinyl pads. These are easy to clean but can be very slippery when you are in the press position. Stitched or textured upholstery gives better grip and can stay cooler when you are training. If you are particularly wet during training then consider a bench with textured upholstery.
Pad Thickness
For typical pressing exercises like bench presses, dumbbell presses, etc., a 5-8cm thick pad is typical. Less than this and you’ll feel bony contact points very quickly, whilst a pad that is too thick will cause your back to arch in a way that alters the typical pressing angle.
Edge Support
Feel along the edges of the bench with your hand. It should be solid to the touch and not sag or taper. This is especially important when using your feet on the bottom of the bench to adjust the angle or when using the bench with different grip widths.
Pad Length and Width
The width of the pad should allow your shoulders to sit flat and be supported, not forced inwards by a narrow surface. A good adjustable weight bench would be around 25 to 30 cm in width. Check the listed dimensions of the adjustable weight bench before purchasing to ensure it is wide enough.
If you are looking for Adjustable Weight Benches, see https://repfitness.com/collections/adjustable-weight-benches/.
So long as you train with safe technique, the NHS advises that you should maintain good body positioning throughout resistance training (reference: NHS). So the padding must enable this.
Press down into the padded section of the bench to check for wear. A well padded bench will feel firm but not compress. An increasingly indented surface indicates worn padding that should be replaced.