Drawstring Backpack - Drawstring Bags. Our large non-woven reflective sports pack is made of 80 gsm water-resistant polypropylene, has corded shoulder straps, carrying handle, and a draw string closure. The corners are reinforced with eyelets. Reflective Stripes are on top and bottom for high visibility. Black accent stripes on top and bottom highlight your logo on the large imprint area. The backpacks are an ideal promotional item for safety, schools, sports teams, camps and clubs.