The Soft Cap is great for shading and blending of colors. It produces a loose 1.3 inch line and is great for clean coverage, and fine art work.
I recommend this product
My in-between Cap
This is my preferred middle-ground cap, when thins are too thin and fats are too fat. It has nice crisp medium lines and good for that medium sized shading fields.
Awesome For Blending
This blue dot soft cap is awesome for blending and fading, allowing you to layer on light coats and build up as needed. Produces a medium sized, very soft feathered like line.