The whistle clamp for the drawstring is a great idea. Loud enough to hurt my ears at full blast. The whistle is small and unobtrusive, so the clamp is still easy to handle, even behind the back. And there's the Morse code for SOS imprinted on both sides of the whistle. Too bad Petzl patented this whistle/clamp combo since it could save the lives of their competitors' customers.
The bag itself is well made. Drawstring closure is tight. The inner and outer materials are permeable cloth so the chalk can absorb moisture in damp conditions like a gym locker or if left outside overnight.
This review was written in the old system and had content requirements that are different than reviews written today.