Refers to the inherent quality, character, or grade of an item, especially goods or products. Somewhat formal and less common in everyday speech than 品質.
The goods in this shop are reputed to be of good quality.
We handle only items of reliable quality.
Compound of 品 (しな, 'goods, article') and 柄 (がら, 'pattern, nature'). The reading しながら is a rendaku form of しな + がら.