Petzl Sakover Storage Bag Gray. Sealed seams with thermo-bonded bands ensure airtight storage of leftover chalk. The roll-top and buckle closure system keeps chalk from spilling out. Specifications for Petzl Sakover Storage Bag: Manufacturer: Petzl Color: Gray Fabric/Material: Nylon Weight: 40 g Features of Petzl Sakover Storage Bag Ultra-lightweight bag for transport of chalk bags Seams with thermo-bonded bands ensure airtight storage of leftover chalk Roll-top and buckle closure system keeps chalk from spilling out Package Contents: Petzl Sakover Storage Bag Petzl S036AA00: Sakover Storage Bag Gray