Our best value mailing sacks. 55 micron (220 gauge) thick grey polythene. Made from 100% recycled material for an environmentally-friendly solution. 40mm lip with a peel-&-seal strip for easy and efficient closure, use with our range of multi-purpose labels. Consider including some tolerance or choosing a bag one size larger so goods fit as expected within the bags. Please note: these bags may or may not be printed with suffocation warning.