Turn them into insulation! This is what happens with old denim jeans: https://www.henry.com/residential/products/insulation/denim-insulation/ultratouch-r13/#pro

Turn them into insulation! This is what happens with old denim jeans: https://www.henry.com/residential/products/insulation/denim-insulation/ultratouch-r13/#product-details-section https://www.henry.com/residential/products/insulation/denim-...