Some shaped saddle pads are made of gel material to provide cushioning.
A shaped (or "numnah") saddle pad is saddle shaped, and is designed to be used alone, or with a square saddle pad. A shaped / numnah pad should only be slightly visible below the saddle.
Gels are gelatin-like polymer materials that are solids, but which absorb shock and dissipate energy like liquids. The drawback to gels is that they are quite heavy, and expensive.
Shop for Shaped, Gel Saddle Pads
Weaver Leather Stacy Westfall Activity Ball, Mediu...
$ 4511 ($0.15/Count) $45.11
Manna Pro 0593557338 Carrot Flavor Blast Treats fo...
$ 1099 ($0.15/Count) $16.80