It's a process of washing a fabric or a garment with bleach product to soften the look of the fabric.
Dyenomite 200BW - Bleach Wash T-Shirt
Dyenomite 680BW - Essential Fleece Bleach Wash Hooded Sweatshirt
Dyenomite 681BW - Essential Fleece Bleach Wash Crewneck Sweatshirt
Hanes 055P - Men's X-Temp w/Fresh IQ Pique Polo