Which bra is comfortable for sagging breasts?

Full-coverage bras and wireless bras are two comfortable options for sagging breasts. 

Full-coverage bras with underwire provide high support, lift, and shaping. This is a great, comfortable option for heavy breasts as their high level of support will take pressure off the back.

Wireless bras are another excellent option for sagging breasts. Because they don't have an underwire, they're incredibly comfortable to wear. Look for wireless bras that have soft, compressive material and molded foam cups for maximum lift and shaping.