Many marathon runners will wear old clothes to the start of a race to stay warm until the race starts. Right before the race starts they will then remove the warm up clothes and leave them at the starting line. A biodegradable running warm up suit could be used instead so that runners could leave these outfits and not worry about littering or needing someone to clean up the outfits after them. These outfits could also be used for camping or longer runs where runners might want to have a warmer layer at the start and as conditions change might want to abandon the outfit along the trail.

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