Donate or sell unwanted clothing that is in good condition. MBMS has a drop box in the parking lot, or used garments and accessories can be sold through online marketplaces. Participating in the secondhand clothing market reduces carbon emissions by 25% on average! Between now and March 15, you can also donate any clean and wearable clothing, accessories, and footwear to the Mira Costa Pop-Up Clothing Swap. There are donation drop boxes at both the MCHS and MBMS front offices.