Nicot Ice Cool Mesh PAD You can stay comfortable even outdoors in the heat by putting a cold pack in the mesh PAD. Easy to attach, just attach the string to the loop at the top of the backpack and the shoulder straps. It's a universal size for adults and children. Gel Cold Pack Size: Ice Cool Mesh PAD: Approx. W20 x H29cm, String (15cm) Gel Cold Pack: Approx. 10cm Brand new, unopened. I am selling it because I don't use it. It has been stored at home. Please purchase only if you understand this.