An eco-friendly solution to lunch on-the-go, the MasterClass Roll Top Lunch Bag is designed to be used again and again. The outer is 100% cotton, while the inner is lined with food-safe, BPA-free PEVA which has been treated with silver phosphate glass antimicrobial technology - killing 99.9% of bacteria. It’ll never wash away, preserving the surface from premature degradation. The strap is adjustable making the bag suitable for a variety of different sized items.