"快" means "pleasure, delight and enjoyment"​ in Japanese Kanji. 

Astigu's new 快 line up is easy to wear and super breathable. Its open crotch design offers a comfortable and lively experience. Even in sweaty seasons and busy times, it's easy to put on and take off. Recommended for those who want to reduce the time it takes to put on and take off stockings, especially during bathroom breaks or busy moments.

By wearing panties over the stockings, you can easily use the bathroom without the hassle of adjusting the stockings. It offers excellent convenience by eliminating the need for pulling up the stockings.

The leg section has been improved with stronger thread construction. It is designed to be non-run, making it less likely for holes to expand.