Fuzzy cotton and poly/cotton need a white with enough body to hold the fibers down. #26 HV White has a high-viscosity formula made for automatic equipment, yet it can still clear the screen on a manual press.
Use it as an underbase or as the final white when you want strong coverage and a smooth surface. Its slight blue tint helps the cured print look bright on dark garments. Test screen setup and pressure before production, especially when pairing a base white with a finer highlight screen.
* Note: For best results, always test print and cure on the actual fabric before production.