White Canadian Squirrel Brush is also available now.

The Charms of the Canadian Squirrel Makeup Brush

Compared to the soft and fuwa fuwa (fluffy) grey squirrel hair, Canadian squirrel hair is known for just a little firmer than grey squirrel hair, and it has a silky softness.
Also, since the tip of the brush is finer with less fluff, you can freely apply make up to delicate spots with thicker shades to create beautiful gradation.
The brush is especially recommended for those who want a brush that doesn't sting, but that's firm enough to apply thick shades of colors.
The advantages of a Canadian squirrel brush is its soft and delicate application as well as its ability to apply thick and rich colors. 

Among other squirrel brushes, the Canadian squirrel brush excels in delicate finishing with its firmness and good color reproduction, making it an especially superb choice for eyeshadows and cheeks.
It also makes for an excellent powder brush, and will give you outstanding cover-up results.