Existing modelLoads of features at an unbeatable price thats the hallmark of MECs Brio pack lineup. The Brio 50 is a top-loading, mid-capacity pack designed for backcountry skiing, hiking, and mountaineering. The main pack fabric is a 210-denier nylon, reinforced in a grid pattern with Dyneema polyethylene threads. Dyneema, the same material used to make climbing slings, gives the fabric great tear-resistance. Dyneema also keeps the fabric surface smooth and minimizes the snow adhesion that can occur with conventional ripstop fabrics.