Ultra-Sil® Shopping Bag . A reusable shopping that will hold up over the years is the most earth-friendly choice you can make. The Sea to Summit Ultra-Sil® Shopping Bag is made of the same high tear strength fabric we make our pack covers, compression sacks and stuff sacks of, so they\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'re amazingly strong and durable. We\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'ve also made sure that the stress points have bar-tacked reinforced stitching. You can fill these shopping bags to capacity week in week out and they won\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'t fall apart like other shopping bags on the market. And because the Ultra-Sil® Shopping Bag is so compact and lightweight you can stash it anywhere - the tiny packed size fits easily onto a key ring with a specially designed snap tab or tucks in a purse or in a jacket pocket, so you\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'re more likely to have one with you when you need it.