Think about the waiting area
Check the forecast close to the event and consider the actual place where you will wait. An exposed street, a covered hall and a sheltered park create different situations. Include the journey from bag drop to the start, not only the moment the race begins. If you hand over your bag early, the warm layer inside it will no longer help during that interval.
Choose a layer you can remove without a complicated struggle around your bib, watch or vest. Try the sequence at home with the complete outfit. A garment that is easy to take off in a bedroom can be awkward when you are standing among other runners with nowhere clean to put a bag. Keep your hands free enough to manage the fastening and retain the items you need.
Decide what happens to the layer
Do not assume clothing left beside the start will be collected for charity. Use the organiser’s stated arrangement, if one exists, and follow its accepted-item and placement instructions. Otherwise carry the layer, hand it to a supporter at an agreed accessible place, or choose an outfit you can retain. Throwing clothing onto the course creates a problem for people behind you.
A supporter handover needs a plan of its own. The person may not be allowed into the start area, and a last-minute search can undo the calm you were trying to create. Agree a precise point before any access control, along with a fallback if you miss each other. Do not depend on passing something over a barrier while the start is moving.
Finally, separate waiting protection from what you want at the finish. A layer given away at the start is not available after the race. Put the return clothing in the correct bag and check any storage arrangements. The aim is a complete clothing journey: travelling, waiting, running and leaving. Thinking through those stages usually exposes a missing layer before race morning does.
