Choosing between rPET (recycled polyethylene terephthalate) and cotton depends on your priorities and needs. Each rPET playmat recycles 48 plastic bottles from the ocean, reducing landfill waste and conserving resources. It's durable, soft and resistant to stains, with lower water usage and carbon emissions in production compared to cotton. On the other hand, cotton offers a natural, soft, and breathable feel, and is fully biodegradable, making it a better end-of-life option. However, it requires significant water, pesticides, and land, impacting ecosystems. Ultimately, choose rPET for durability and lower immediate environmental impact and ease of washing, or choose cotton for natural comfort and biodegradability but you'll need to wash it delicately or even spot wash it to avoid warping the fabric. Assess your values and usage to make the best choice.